Associate Professor
- Locations
- Lab 425
Room 414
- Phone numbers
- 7754 (Office)
64 3 479 7754 (Office Direct Dial)
4600 (Lab)
- harald.schwefel@otago.ac.nz
- Research Group
- https://www.physics.otago.ac.nz/research/resonantoptics/
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Biography
I began my physics training in Germany at the Brandenburg Technical University in Cottbus. In 1998 I began graduate study at Yale University, USA where I received my PhD in theoretical physics in 2004 on the topic of chaotic dielectric resonators. Following a short stay in Japan, I established myself as an experimental physicist and later group leader at the Max Planck Institute for the Science of Light in Germany. In September 2015 I joined the Department of Physics at the University of Otago and have reestablished my laboratory there.Current teaching
PHSI 232 Electromagnetism and Optics
PHSI 381 Experimental Physics II
Course Coordinator
PHSI 232 Electromagnetism and Optics
PHSI 381 Experimental Physics II
Publications
Kessenich, H., Suresh, M. I., Platt, L., Vogt, D. W., Sedlmeir, F., Schwefel, H. G. L., & Seppala, A. (2023). Photonic radiometers for next-generation stratospheric ozone detection. Proceedings of the American Geophysical Union (AGU) Fall Meeting: Wide. Open. Science. A41I-2732. Retrieved from https://www.agu.org Conference Contribution - Published proceedings: Abstract
Suresh, M. I., Schwefel, H. G. L., & Vogt, D. W. (2023). Gallium arsenide whispering gallery mode resonators for terahertz photonics. Optics Express, 31(20), 33056-33063. doi: 10.1364/OE.498406 Journal - Research Article
Qureshi, P. C., Ng, V., Azeem, F., Trainor, L. S., Schwefel, H. G., Coen, S., … Murdoch, S. G. (2023). Kerr microresonator dual-comb source with adjustable line-spacing. Optics Express, 31(22), 36236-36244. doi: 10.1364/OE.501110 Journal - Research Article
Qureshi, P. C., Ng, V., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2023). Tunable dual comb source in a Kerr microresonator. Proceedings of the Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). doi: 10.1109/CLEO/Europe-EQEC57999.2023.10232518 Conference Contribution - Published proceedings: Abstract
Ng, V., Qureshi, P. C., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2023). Magnesium fluoride photonic-belt resonators for generating broadband frequency combs. Proceedings of the Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). doi: 10.1109/CLEO/Europe-EQEC57999.2023.10232164 Conference Contribution - Published proceedings: Abstract
Trainor, L. S., Ma, L., King, G. G. G., Schwefel, H. G. L., & Longdell, J. J. (2023). Microwave-optical double resonance in an erbium-doped whispering-gallery resonator. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 44). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Tian, C., Sedlmeir, F., Blaikie, R., & Schwefel, H. (2023). Nanocrystals on the crystalline whispering gallery mode resonator. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 43). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Ng, V., Qureshi, P. C., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2023). Broadband frequency combs in photonic belt resonators. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 31). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Lambert, N. J., Sedlmeir, F., Yue, G., & Schwefel, H. G. L. (2023). Hot spot driving of a large whispering gallery mode resonator. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 19). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Suresh, M., Vogt, D., Platt, L., Kessenich, H., Seppälä, A., & Schwefel, H. (2023). GaAs resonators for photonic radiometers. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 26). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Qureshi, P. C., Ng, V., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2023). Tunable multimode dual combs in a Kerr microresonator. Proceedings of the Te Whai Ao: Dodd-Walls Centre (DWC) Rotorua Symposium. (pp. 21). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Ma, L., Trainor, L. S., King, G. G. G., Schwefel, H. G. L., & Longdell, J. J. (2023). Optically detected magnetic resonance to characterize atomlike microwave-optical transducers. Physical Review A, 107, 053514. doi: 10.1103/PhysRevA.107.053514 Journal - Research Article
Lambert, N. J., Trainor, L. S., & Schwefel, H. G. L. (2023). Microresonator-based electro-optic dual frequency comb. Communications Physics, 6(1), 89. doi: 10.1038/s42005-023-01197-x Journal - Research Article
Ng, V., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., Erkintalo, M., & Murdoch, S. G. (2023). Wideband multimode optical parametric oscillation in a Kerr microresonator. Optics Express, 31(4), 5475-5482. doi: 10.1364/OE.480030 Journal - Research Article
Azeem, F., Trainor, L. S., Gao, A., Isarov, M., Strekalov, D. V., & Schwefel, H. G. L. (2023). Whispering gallery mode resonators: An alternate platform for Ti:sapphire lasers and amplifiers. Proceedings of the International Conference on Emerging Trends in Electrical, Control, and Telecommunication Engineering (ETECTE). IEEE. doi: 10.1109/ETECTE55893.2022.10007203 Conference Contribution - Published proceedings: Full paper
Christensen, J. T., Azeem, F., Trainor, L. S., Strekalov, D. V., & Schwefel, H. G. L. (2022). Distance calibration via Newton's rings in yttrium lithium fluoride whispering gallery mode resonators. Optics Letters, 47(23), 6053-6056. doi: 10.1364/OL.474539 Journal - Research Article
Ng, V., Qureshi, P., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2022). Intermodal four-wave mixing in MgF2 microresonators enable ultra-wide frequency Generation. Proceedings of the Conference on Lasers and Electro-Optics (CLEO): QELS Fundamental Science. FW1B.5. Retrieved from https://opg.optica.org/abstract.cfm?uri=CLEO_QELS-2022-FW1B.5 Conference Contribution - Published proceedings: Abstract
Qureshi, P. C., Ng, V., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2022). Nonlinear scattering of dissipative solitons in a Kerr microresonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO): QELS Fundamental Science. FW1B.3. Retrieved from https://opg.optica.org/abstract.cfm?uri=CLEO_QELS-2022-FW1B.3 Conference Contribution - Published proceedings: Abstract
Azeem, F., Trainor, L. S., Gao, A., Isarov, M., Strekalov, D. V., & Schwefel, H. G. L. (2022). Observance of lasing and amplification in the first titanium doped sapphire whispering-gallery laser. Proceedings of the Conference on Lasers and Electro-Optics (CLEO): Science and Innovations. SF3I.4. Retrieved from https://opg.optica.org/abstract.cfm?uri=CLEO_SI-2022-SF3I.4 Conference Contribution - Published proceedings: Abstract
Suresh, M. I., Platt, L., Vogt, D. W., & Schwefel, H. G. L. (2022). Photonic radiometers for CubeSat monitoring of greenhouse gases. Proceedings of the Dodd-Walls Centre Dunedin Symposium. Retrieved from https://www.doddwalls.ac.nz/events Conference Contribution - Published proceedings: Abstract
Qureshi, P. C., Ng, V., Azeem, F., Trainor, L., Schwefel, H., Coen, S., … Murdoch, S. G. (2022). Nonlinear scattering of a cavity soliton in a Kerr microresonator. Proceedings of the Dodd-Walls Centre Dunedin Symposium. Retrieved from https://www.doddwalls.ac.nz/events Conference Contribution - Published proceedings: Abstract
Lambert, N. J., Schumer, A., Longdell, J. J., Rotter, S., & Schwefel, H. G. L. (2022). Control of magnon polaritons using rapid adiabatic passage and exceptional points. Proceedings of the Dodd-Walls Centre Dunedin Symposium. Retrieved from https://www.doddwalls.ac.nz/events Conference Contribution - Published proceedings: Abstract
Christensen, J., Azeem, F., Strekalov, D. V., & Schwefel, H. G. L. (2022). Distance calibration via Newton's rings in the first high-Q yttrium lithium fluoride whispering gallery mode resonator. Proceedings of the Dodd-Walls Centre Dunedin Symposium. Retrieved from https://www.doddwalls.ac.nz/events Conference Contribution - Published proceedings: Abstract
Qureshi, P. C., Ng, V., Azeem, F., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2022). Soliton linear-wave scattering in a Kerr microresonator. Communications Physics, 5, 123. doi: 10.1038/s42005-022-00903-5 Journal - Research Article
Azeem, F., Trainor, L. S., Gao, A., Isarov, M., Strekalov, D. V., & Schwefel, H. G. L. (2022). Ultra-low threshold titanium-doped sapphire whispering-gallery laser. Advanced Optical Materials, 10, 2102137. doi: 10.1002/adom.202102137 Journal - Research Article
Azeem, F., Trainor, L. S., Strekalov, D. V., & Schwefel, H. G. L. (2021). Optical parametric oscillation (OPO) in crystalline whispering-gallery mode resonators. Proceedings of the New Zealand Institute of Physics (NZIP) & Physikos Conference. Retrieved from https://confer.eventsair.com/nzip2021/ Conference Contribution - Published proceedings: Abstract
Mobassem, S., Lambert, N. J., Rueda, A., Fink, J. M., Leuchs, G., & Schwefel, H. G. L. (2021). Thermal noise and fidelity in electro-optic devices. Proceedings of the New Zealand Institute of Physics (NZIP) & Physikos Conference. Retrieved from https://confer.eventsair.com/nzip2021/ Conference Contribution - Published proceedings: Abstract
Azeem, F., Trainor, L. S., Isarov, M., Kumari, M., Strekalov, D. V., & Schwefel, H. G. L. (2021). Low-threshold lasing in Ti:sapphire whispering-gallery laser. Proceedings of the New Zealand Institute of Physics (NZIP) & Physikos Conference. Retrieved from https://confer.eventsair.com/nzip2021/ Conference Contribution - Published proceedings: Abstract
Lambert, N. J., & Schwefel, H. G. L. (2021). Visualising the heart of chaos. Light, 10(1), 214. doi: 10.1038/s41377-021-00656-w Journal - Research Other
Mobassem, S., Lambert, N. J., Rueda, A., Fink, J. M., Leuchs, G., & Schwefel, H. G. L. (2021). Thermal noise in electro-optic devices at cryogenic temperatures. Quantum Science & Technology, 6, 045005. doi: 10.1088/2058-9565/ac0f36 Journal - Research Article
Azeem, F., Trainor, L. S., Devane, P. A., Norman, D. S., Rueda, A., Lambert, N. J., Kumari, M., … Schwefel, H. G. L. (2021). Dielectric perturbations: Anomalous resonance frequency shifts in optical resonators. Optics Letters, 46(10), 2477-2480. doi: 10.1364/OL.420791 Journal - Research Article
Denys, M. D. E., Olsen, M. K., Trainor, L. S., Schwefel, H. G. L., & Bradley, A. S. (2021). Steady states, squeezing, and entanglement in intracavity triplet down conversion. Optics Communications, 484, 126699. doi: 10.1016/j.optcom.2020.126699 Journal - Research Article
Hease, W., Rueda, A., Sahu, R., Wulf, M., Arnold, G., Schwefel, H. G. L., & Fink, J. M. (2020). Bidirectional electro-optic wavelength conversion in the quantum ground state. PRX Quantum, 1, 020315. doi: 10.1103/PRXQuantum.1.020315 Journal - Research Article
Azeem, F., Trainor, L. S., Devane, P. A., Norman, D., Rueda, A., Lambert, N. J., Kumari, M., … Schwefel, H. G. L. (2020). Dielectric perturbations: Anomalous resonance frequency shifts in optical resonators. arXiv. Retrieved from https://arxiv.org/abs/2012.12446 Working Paper; Discussion Paper; Technical Report
Wasiak, M., Botello, G. S., Abdalmalak, K. A., Sedlmeir, F., Rueda, A., Segovia-Vargas, D., Schwefel, H. G. L., & García-Muñoz, L. E. (2020). Compact millimeter and submillimeter-wave photonic radiometer for cubesats. Proceedings of the 14th European Conference on Antennas and Propagation (EuCAP). IEEE. doi: 10.23919/EuCAP48036.2020.9135962 Conference Contribution - Published proceedings: Full paper
Sayson, N. L. B., Bi, T., Ng, V., Pham, H., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2020). Large-frequency-shift tunable parametric oscillation in a Kerr microresonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). IEEE. [Full Paper] Conference Contribution - Published proceedings: Full paper
Hendry, I., Trainor, L. S., Xu, Y., Coen, S., Murdoch, S. G., Schwefel, H. G. L., & Erkintalo, M. (2020). Observation of internally-pumped parametric oscillation and initial stages of χ(2) comb generation in a lithium niobate microresonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). FTh3J.8. IEEE. doi: 10.1364/CLEO_QELS.2020.FTh3J.8 Conference Contribution - Published proceedings: Full paper
Mobassem, S., Lambert, N. J., Rueda, A., Fink, J. M., Leuchs, G., & Schwefel, H. G. L. (2020). Thermal noise in electro-optic devices at cryogenic temperatures. arXiv. Retrieved from https://arxiv.org/abs/2008.08764 Working Paper; Discussion Paper; Technical Report
Shafiee, G., Strekalov, D. V., Otterpohl, A., Sedlmeir, F., Schunk, G., Vogl, U., Schwefel, H. G. L., … Marquardt, C. (2020). Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime. New Journal of Physics, 22, 073045. doi: 10.1088/1367-2630/ab9a87 Journal - Research Article
Lambert, N. J., Esmail, A. A., Edwards, M., Ferguson, A. J., & Schwefel, H. G. L. (2020). Random telegraph signal analysis with a recurrent neural network. Physical Review E: Statistical, Nonlinear, & Soft Matter Physics, 102, 012312. doi: 10.1103/PhysRevE.102.012312 Journal - Research Article
Lambert, N. J., Rueda, A., Sedlmeir, F., & Schwefel, H. G. L. (2020). Coherent conversion between microwave and optical photons: An overview of physical implementations [Progress report]. Advanced Quantum Technologies, 3(1), 1900077. doi: 10.1002/qute.201900077 Journal - Research Other
Hease, W., Rueda, A., Sahu, R., Wulf, M., Arnold, G., Schwefel, H. G. L., & Fink, J. M. (2020). Cavity quantum electro-optics: Microwave-telecom conversion in the quantum ground state. arXiv. Retrieved from https://arxiv.org/abs/2005.12763 Working Paper; Discussion Paper; Technical Report
Hendry, I., Trainor, L. S., Xu, Y., Coen, S., Murdoch, S. G., Schwefel, H. G. L., & Erkintalo, M. (2020). Experimental observation of internally pumped parametric oscillation and quadratic comb generation in a χ2 whispering-gallery-mode microresonator. Optics Letters, 45(5), 1204-1207. doi: 10.1364/OL.385751 Journal - Research Article
Lambert, N. J., Esmail, A. A., Edwards, M., Ferguson, A. J., & Schwefel, H. G. L. (2020). Random telegraph signal analysis with a recurrent neural network. arXiv. Retrieved from https://arxiv.org/abs/2002.05817 Working Paper; Discussion Paper; Technical Report
van Gelder, L., & Schwefel, H. (2019, October). Shedding light on the distant past: How quantum physics supports prehistoric archaeology. Verbal presentation at the New Zealand Conservators of Cultural Materials (NZCCM) National Conference, Christchurch, New Zealand. Conference Contribution - Verbal presentation and other Conference outputs
Hendry, I., Trainor, L., Schwefel, H., Murdoch, S., & Erkintalo, M. (2019). Experimental observation of internally-pumped parametric oscillation in a lithium niobate microresonator. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 60). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Vogt, D. W., Jones, A. H., Schwefel, H. G. L., & Leonhardt, R. (2019). Two octaves spanning high-Q terahertz whispering-gallery modes. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 57). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Mobbasem, S., Azeem, F., Kumari, M., Rueda, A., Sedlmeir, F., & Schwefel, H. G. L. (2019). Electro-optic microwave to optical photon conversion. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 47). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Gao, A., Azeem, F., Denys, M., & Schwefel, H. G. L. (2019). Ti:Sapphire whispering gallery mode resonators. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 34). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Lambert, N., Mobbasem, S., Azeem, F., Kumari, M., Rueda, A., Sedlmeir, F., … Schwefel, H. G. L. (2019). Resonantly enhanced microwave up-conversion. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 26). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Leuchs, G., Kumari, M., & Schwefel, H. G. L. (2019). Resonant electro-optic frequency comb generation in lithium niobate whispering gallery mode resonators. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 23). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Sayson, N. L. B., Pham, H., Bi, T., Webb, K. E., Ng, V., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2019). Octave-spanning tunable optical parametric oscillation in magnesium fluoride microresonators. Proceedings of the 12th Annual Dodd-Walls Centre Symposium. (pp. 9). Retrieved from https://www.otago.ac.nz/dodd-walls Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Leuchs, G., Kumari, M., & Schwefel, H. G. L. (2019). Resonant electro-optic frequency comb generation in lithium niobate disk resonator inside a microwave cavity [Extended abstract]. Optical Society of America (OSA) Technical Digest: Nonlinear Optics (NLO). NM2A.5. Optical Society of America (OSA). [Abstract] Conference Contribution - Published proceedings: Abstract
Erkintalo, M., Sayson, N., Bi, T., Ng, V., Pham, H., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2019). Octave-spanning tunable parametric oscillation in crystalline Kerr microresonators. Proceedings of the Nonlinear Optics (NLO) Conference. NM2A.4. Washington, DC: Optical Society of America. doi: 10.1364/NLO.2019.NM2A.4 Conference Contribution - Published proceedings: Full paper
Hendry, I., Trainor, L. S., Xu, Y., Coen, S., Murdoch, S. G., Schwefel, H. G. L., & Erkintalo, M. (2019). Experimental observation of internally-pumped parametric oscillation and quadratic comb generation in a χ(2) whispering-gallery-mode microresonator. arXiv. Retrieved from https://arxiv.org/abs/1912.02804 Working Paper; Discussion Paper; Technical Report
Shafiee, G., Strekalov, D. V., Otterpohl, A., Sedlmeir, F., Schunk, G., Vogl, U., Schwefel, H. G. L., … Marquardt, C. (2019). Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime. arXiv. Retrieved from https://arxiv.org/abs/1912.01263 Working Paper; Discussion Paper; Technical Report
Rueda, A., Sedlmeir, F., Leuchs, G., Kuamri, M., & Schwefel, H. G. L. (2019). Electro-optic frequency comb generation in lithium niobate whispering gallery mode resonators. Proceedings of the Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE. doi: 10.1109/CLEOE-EQEC.2019.8873300 Conference Contribution - Published proceedings: Full paper
Bi, T., Sayson, N. L. B., Ng, V., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2019). Continuous tunability of a microresonator parametric oscillator. Proceedings of the Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE. doi: 10.1109/CLEOE-EQEC.2019.8872580 Conference Contribution - Published proceedings: Full paper
Sayson, N. L. B., Bi, T., Ng, V., Pham, H., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2019). Wideband tunability of kerr parametric oscillation in an MgF2 microresonator. Proceedings of the Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE. doi: 10.1109/CLEOE-EQEC.2019.8871691 Conference Contribution - Published proceedings: Full paper
Denys, M. D. E., Olsen, M. K., Trainor, L. S., Schwefel, H. G. L., & Bradley, A. S. (2019). Steady states, squeezing, and entanglement in intracavity triplet down conversion. arXiv. Retrieved from https://arxiv.org/abs/1907.09572 Working Paper; Discussion Paper; Technical Report
Sayson, N. L. B., Bi, T., Ng, V., Pham, H., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2019). Octave-spanning tunable parametric oscillation in crystalline Kerr microresonators. Nature Photonics, 13, 701-706. doi: 10.1038/s41566-019-0485-4 Journal - Research Article
Rueda, A., Sedlmeir, F., Kumari, M., Leuchs, G., & Schwefel, H. G. L. (2019). Resonant electro-optic frequency comb. Nature, 568, 378-381. doi: 10.1038/s41586-019-1110-x Journal - Research Article
Vogt, D. W., Jones, A. H., Schwefel, H. G. L., & Leonhardt, R. (2019). Anomalous blue-shift of terahertz whispering-gallery modes via dielectric and metallic tuning. Optics Letters, 44(6), 1319-1322. doi: 10.1364/OL.44.001319 Journal - Research Article
Rueda, A., Sedlmeir, F., Leuchs, G., Kumari, M., & Schwefel, H. G. L. (2019). Resonant electro-optic frequency comb (v2). arXiv. Retrieved from https://arxiv.org/abs/1808.10608v2 Working Paper; Discussion Paper; Technical Report
Sayson, N. L. B., Pham, H., Webb, K. E., Ng, V., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2018). Broadly tunable optical parametric oscillation in magnesium flouride (MgF2) microresonators. Proceedings of the 11th Annual Dodd-Walls Centre Symposium. (pp. 68). Retrieved from http://www.doddwalls.ac.nz/ Conference Contribution - Published proceedings: Abstract
Devane, P. A., Kumari, M., Trainor, L. S., & Schwefel, H. G. L. (2018). Frequency shifting whispering gallery modes with planar dielectric substrates. Proceedings of the 11th Annual Dodd-Walls Centre Symposium. (pp. 38). Retrieved from http://www.doddwalls.ac.nz/ Conference Contribution - Published proceedings: Abstract
Trainor, L. S., & Schwefel, H. G. L. (2018). A third-order down-conversion optical parametric oscillator. Proceedings of the 11th Annual Dodd-Walls Centre Symposium. (pp. 31). Retrieved from http://www.doddwalls.ac.nz/ Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Mobassem, S., Kumari, M., & Schwefel, H. G. L. (2018, December). Frequency comb generation using lithium niobate whispering gallery mode resonators. Poster session presented at the IONS Conference on Optics, Atoms, and Laser Applications (KOALA), Sydney, Australia. Conference Contribution - Poster Presentation (not in published proceedings)
Gao, A., Azeem, F., Dens, M., & Schwefel, H. G. L. (2018, December). Titanium-doped sapphire whispering gallery mode resonators. Poster session presented at the IONS Conference on Optics, Atoms, and Laser Applications (KOALA), Sydney, Australia. Conference Contribution - Poster Presentation (not in published proceedings)
Schwefel, H. (2018, May). Asymmetric crystalline cavities for flexible non-linear optics. Invited presentation at the 2nd International Workshop on Asymmetric Microcavity and Wave Chaos, Fuzhou, China. Conference Contribution - Verbal presentation and other Conference outputs
Trainor, L. S., Sedlmeir, F., Peuntinger, C., & Schwefel, H. G. L. (2018). Highly efficient polarization-selective out-coupling of harmonic light in birefringent WGM resonators. Proceedings of SPIE (Vol. 10518): Laser Resonators, Microresonators, and Beam Control XX. doi: 10.1117/12.2295863 Conference Contribution - Published proceedings: Full paper
Halbauer, T., Shafiee, G., Schunk, G., Otterpohl, A., Sedlmeir, F., Strekalov, D., Schwefel, H. G. L., … Marquardt, C. (2018). Towards a whispering gallery mode resonator based wavemeter. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q51.68. Retrieved from https://www.dpg-physik.de/index.html Conference Contribution - Published proceedings: Abstract
Otterpohl, A., Sedlmeir, F., Dirmeier, T., Vogl, U., Schunk, G., Shafiee, G., … Schwefel, H. G. L., … Marquardt, C. (2018). Generation of squeezed vacuum states in a nonlinear crystalline whispering gallery mode resonator. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q51.60. Retrieved from https://www.dpg-physik.de/index.html Conference Contribution - Published proceedings: Abstract
Shafiee, G., Schunk, G., Sedlmeir, F., Otterpohl, A., Vogl, U., Strekalov, D., Schwefel, H. G. L., … Marquardt, C. (2018). Sagnac-type setup for the generation of tunable polarization entangled photon pairs. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q51.36. Retrieved from https://www.dpg-physik.de/index.html Conference Contribution - Published proceedings: Abstract
Schwefel, H. G. L. (2018). Effcient microwave to optical photon conversion: An electro-optical realisation [Invited]. Proceedings of the 2nd CEMS International Symposium on Dynamics in Artificial Quantum Systems (DAQS2018). Mo03. Retrieved from https://www.cems.riken.jp/2018daqs/index.html Conference Contribution - Published proceedings: Abstract
Otterpohl, A., Sedlmeir, F., Shafiee, G., Dirmeier, T., Vogl, U., Schunk, G., … Schwefel, H. G. L., … Marquardt, C. (2018). Squeezed vacuum states from a whispering gallery mode resonator. Frontiers in Optics (FiO): Conference Proceedings of OSA's Annual Meeting. FW7B.3. Washington, DC: Optical Society of America. doi: 10.1364/FIO.2018.FW7B.3 Conference Contribution - Published proceedings: Abstract
Devane, P. A., Kumari, M., Trainor, L. S., & Schwefel, H. G. L. (2018). Frequency shifting whispering gallery modes with planar dielectric substrates. Frontiers in Optics (FiO): Conference Proceedings of OSA's Annual Meeting. JW3A.31. Washington, DC: Optical Society of America. doi: 10.1364/FIO.2018.JW3A.31 Conference Contribution - Published proceedings: Abstract
Vogt, D. W., Jones, A. H., Schwefel, H. G. L., & Leonhardt, R. (2018). Prism coupling of high-Q terahertz whispering-gallery-modes over two octaves from 0.2 THz to 1.1 THz. Optics Express, 26(24), 31190-31198. doi: 10.1364/OE.26.031190 Journal - Research Article
Santamaría Botello, G., Sedlmeir, F., Rueda, A., Abdalmalak, K. A., Brown, E. R., Leuchs, G., … Schwefel, H. G. L. (2018). Sensitivity limits of millimeter-wave photonic radiometers based on efficient electro-optic upconverters. Optica, 5(10), 1210-1219. doi: 10.1364/optica.5.001210 Journal - Research Article
Kornienko, V. V., Kitaeva, G. K., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2018). Towards terahertz detection and calibration through spontaneous parametric down-conversion in the terahertz idler-frequency range generated by a 795 nm diode laser system. APL Photonics, 3(5), 051704. doi: 10.1063/1.5011201 Journal - Research Article
Sayson, N. L. B., Pham, H., Webb, K. E., Ng, V., Trainor, L. S., Schwefel, H. G. L., … Murdoch, S. G. (2018). Origins of clustered frequency combs in Kerr microresonators. Optics Letters, 43(17), 4180-4183. doi: 10.1364/OL.43.004180 Journal - Research Article
Rueda, A., Sedlmeir, F., Leuchs, G., Kumari, M., & Schwefel, H. G. L. (2018). Resonant electro-optic frequency comb. arXiv. Retrieved from https://arxiv.org/abs/1808.10608 Working Paper; Discussion Paper; Technical Report
Pham, H., Sayson, N. L. B., Webb, K. E., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2018). Origin of clustered frequency combs in Kerr microresonators. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). FW3E.2. doi: 10.1364/CLEO_QELS.2018.FW3E.2 Conference Contribution - Published proceedings: Abstract
Schwefel, H. G. L., Trainor, L. S., Rueda, A., & Sedlhmeir, F. (2018). Nonlinear and quantum optics within whispering gallery mode resonators. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). FTh1E.1. doi: 10.1364/CLEO_QELS.2018.FTh1E.1 Conference Contribution - Published proceedings: Abstract
Sayson, N. L. B., Pham, H., Webb, K. E., Trainor, L. S., Schwefel, H. G. L., Coen, S., … Murdoch, S. G. (2018). Widely-tunable optical parametric oscillation in MgF2 microresonators. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). SM2D.2. doi: 10.1364/CLEO_SI.2018.SM2D.2 Conference Contribution - Published proceedings: Abstract
François, A., Schwefel, H., & Monro, T. M. (2018). Using the lasing threshold in whispering gallery mode resonators for refractive index sensing. Proceedings of SPIE (Vol. 10518): Laser Resonators, Microresonators, and Beam Control XX. 105180V. doi: 10.1117/12.2288871 Conference Contribution - Published proceedings: Full paper
Trainor, L. S., Sedlmeir, F., Peuntinger, C., & Schwefel, H. G. L. (2018). Selective coupling enhances harmonic generation of whispering-gallery modes. Physical Review Applied, 9(2), 024007. doi: 10.1103/PhysRevApplied.9.024007 Journal - Research Article
Ge, L., Feng, L., & Schwefel, H. G. L. (2017). Optical microcavities: New understandings and developments. Photonics Research, 5(6), OM1-OM3. doi: 10.1364/PRJ.5.000OM1 Journal - Research Other
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Schunk, G., … Schwefel, H. G. L. (2017). Single sideband microwave to optical photon conversion-an electro-optic realization. Proceedings of the Nonlinear Optics Conference. NM3A.1. doi: 10.1364/NLO.2017.NM3A.1 Conference Contribution - Published proceedings: Abstract
Trainor, L. S., Sedlmeir, F., Peuntinger, C., & Schwefel, H. G. L. (2017). Broadband second harmonic generation in whispering gallery mode resonators enhanced by polarization selective out-coupling. Proceedings of the Nonlinear Optics Conference. NM3A.2. OSA. doi: 10.1364/NLO.2017.NM3A.2 Conference Contribution - Published proceedings: Abstract
Botello, G. S., Abdalmalak, K. A., Schlecht, M.-T., González-Overjero, M.-T., Sedlmeir, F., Schwefel, H. G. L., … Muñoz, L.-E. G. (2017). Analytical study of free-space coupling of THz radiation for a new radioastronomy receiver concept. Proceedings of the 11th European Conference on Antennas and Propagation (EUCAP). (pp. 836-840). doi: 10.23919/EuCAP.2017.7928481 Conference Contribution - Published proceedings: Full paper
Sedlmeir, F., Foreman, M. R., Vogl, U., Zeltner, R., Schunk, G., Strekalov, D. V., … Schwefel, H. G. L. (2017). Polarization-selective out-coupling of whispering-gallery modes. Physical Review Applied, 7(2), 024029. doi: 10.1103/PhysRevApplied.7.024029 Journal - Research Article
Trainor, L. S., Peuntinger, C., Sedlmeir, F., & Schwefel, H. G. L. (2017). Harmonic generation in a birefringent whispering gallery mode resonator. Proceedings of the 10th Annual Dodd-Walls Symposium. (pp. 39). Retrieved from http://www.doddwalls.ac.nz/ Conference Contribution - Published proceedings: Abstract
Schwefel, H. G. L., Erkintalo, M., & Coen, S. (2017). Optical resonators for linear and nonlinear interactions [Workshop]. Proceedings of the 10th Annual Dodd-Walls Symposium. (pp. 11). Retrieved from http://www.doddwalls.ac.nz/ Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Schunk, G., … Schwefel, H. G. L. (2017). Efficient microwave to optical photon conversion: An electro-optical realisation [Invited]. Proceedings of the 47th Winter Colloquium on the Physics of Quantum Electronics (PQE). (pp. 309). Retrieved from http://www.pqeconference.com/pqe2017/ Conference Contribution - Published proceedings: Abstract
Santamaría-Botello, G. A., García Muñoz, L. E., Sedlmeir, F., Preu, S., Segovia-Vargas, D., Atia Abdalmalak, K., … Schwefel, H. G. L., & Weber, H. B. (2016). Maximization of the optical intra-cavity power of whispering-gallery mode resonators via coupling prism. Optics Express, 24(23), 26503-26514. doi: 10.1364/OE.24.026503 Journal - Research Article
Strekalov, D. V., Marquardt, C., Matsko, A. B., Schwefel, H. G. L., & Leuchs, G. (2016). Nonlinear and quantum optics with whispering gallery resonators. Journal of Optics, 18, 123002. doi: 10.1088/2040-8978/18/12/123002 Journal - Research Article
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Fink, J., … Schwefel, H. G. L. (2016, June-July). Efficient single sideband microwave to optical conversion using a LiNbO3 WGM-resonator. Poster session presented at the 23rd Central European Workshop on Quantum Optics, Kolymbari, Greece. Conference Contribution - Poster Presentation (not in published proceedings)
Schunk, G., Shafiee, G., Vogl, U., Strekalov, D. V., Förtsch, M., Otterpohl, A., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2016). Interfacing atomic transitions with single photons [Invited]. Proceedings of the 25th Annual International Laser Physics Workshop. Retrieved from http://www.lasphys.com/workshops/lasphys16/ Conference Contribution - Published proceedings: Abstract
Rueda, A. R., Sedlmeir, F., & Schwefel, H. G. L. (2016). Electro-opical modulator with 0.1% quantum efficiency. Proceedings of the 4th Advanced Electromagnetics Symposium (AES). Retrieved from http://mysymposia.org/index.php/AES17/AES16 Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Schunk, G., … Schwefel, H. G. L. (2016). Nonlinear single sideband microwave to optical conversion using an electro-optic WGM-resonator. Proceedings of the Photonics and Fiber Technology Congress. NTh3A.6. doi: 10.1364/NP.2016.NTh3A.6 Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Rueda, A., Preu, S., García-Muñoz, L. E., & Schwefel, H. G. L. (2016). Efficient and coherent conversion of 80 GHz signals into the optical domain using a nonlinear whispering gallery mode resonator. Proceedings of the Photonics and Fiber Technology Congress. NTh3A.4. doi: 10.1364/NP.2016.NTh3A.4 Conference Contribution - Published proceedings: Abstract
Peuntinger, C., Trainor, L., Sedlmeir, F., Hauer, M., Strekalov, D. V., & Schwefel, H. G. L. (2016). Third harmonic generation in birefringent WGM Resonators: A survey of possible geometries. Proceedings of the Photonics and Fiber Technology Congress. JT4A.24. doi: 10.1364/ACOFT.2016.JT4A.24 Conference Contribution - Published proceedings: Abstract
Schunk, G., Shafiee, G., Vogl, U., Strekalov, D., Otterpohl, A., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2016). Towards two-photon interference with a whispering gallery photon pair source. Proceedings of the Photonics and Fiber Technology Congress. NTh2A.5. doi: 10.1364/NP.2016.NTh2A.5 Conference Contribution - Published proceedings: Abstract
Schunk, G., Shafiee, G., Vogl, U., Strekalov, D., Otterpohl, A., Soltani, N., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2016). Two-photon interference with a non-degenerate photon-pair source. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). (pp. 78). Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Otterpohl, A., Schunk, G., Vogl, U., Sedlmeir, F., Shafiee, G., Strekalov, D., … Schwefel, H. G. L., … Marquardt, C. (2016). Towards and beyond squeezed vacuum states in a nonlinear crystalline whispering gallery mode resonator. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). (pp. 79-80). Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Schunk, G., … Schwefel, H. G. L. (2016). Efficient single sideband microwave to optical conversion using a LiNbO3 WGM-resonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). SF2G.3. doi: 10.1364/CLEO_SI.2016.SF2G.3 Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Rueda, A., Preu, S., García-Muñoz, L. E., & Schwefel, H. G. L. (2016). Efficient up-conversion of weak THz signals into the optical domain using a whispering gallery mode resonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). STh1I.6. doi: 10.1364/CLEO_SI.2016.STh1I.6 Conference Contribution - Published proceedings: Abstract
Foreman, M. R., Sedlmeir, F., Schwefel, H. G. L., & Leuchs, G. (2016). Dielectric tuning and coupling of whispering gallery modes using an anisotropic prism. Journal of the Optical Society of America B, 33(11), 2177-2195. doi: 10.1364/JOSAB.33.002177 Journal - Research Article
Schwefel, H. G. L., Rueda, A., & Sedlmeir, F. (2016). Efficient microwave to optical photon conversion: An electro-optical approach. In M. Andersen & A. Deb (Eds.), Proceedings of the 9th Annual Dodd-Walls Symposium. (pp. 24). Retrieved from http://www.doddwalls.ac.nz/wawcs0138456/Symposium.html Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Schunk, G., … Schwefel, H. G. L. (2016). Efficient microwave to optical photon conversion: An electro-optical realization. Optica, 3(6), 597-604. doi: 10.1364/OPTICA.3.000597 Journal - Research Article
Santamaría-Bortello, G., Rivera-Lavado, A., Preu, S., Sedlmeir, F., Lioubtchenko, D., Schwefel, H., … García Muñoz, L. E. (2016). Sub-THz photon counting receiver working at room temperature for polarization measurements of the cosmic microwave background radiation. Proceedings of the 10th European Conference on Antennas and Propagation (EuCAP). IEEE. doi: 10.1109/EuCAP.2016.7481288 Conference Contribution - Published proceedings: Full paper
Schunk, G., Vogl, U., Sedlmeir, F., Strekalov, D. V., Otterpohl, A., Averchenko, V., Schwefel, H. G. L., … Marquardt, C. (2016). Frequency tuning of single photons from a whispering-gallery mode resonator to MHz-wide transitions. Journal of Modern Optics, 63(20), 2058-2073. doi: 10.1080/09500340.2016.1148211 Journal - Research Article
Sedlmeir, F., Peuntinger, C., Hauer, M., & Schwefel, H. G. L. (2016). Third harmonic generation in Birefringent WGM resonators. In A. B. Deb & N. Kjærgaard (Eds.), Proceedings of the Matariki Workshop on Quantum Science. (pp. 61). Retrieved from http://quantum.otago.ac.nz/mqs2016.html Conference Contribution - Published proceedings: Abstract
Rueda, A., Sedlmeir, F., Collodo, M. C., Vogl, U., Stiller, B., Schunk, G., … Schwefel, H. G. L. (2016). Efficient single sideband microwave to optical conversion using a nonlinear WGM-resonator. In A. B. Deb & N. Kjærgaard (Eds.), Proceedings of the Matariki Workshop on Quantum Science. (pp. 36). Retrieved from http://quantum.otago.ac.nz/mqs2016.html Conference Contribution - Published proceedings: Abstract
Schwefel, H. G. L., Rueda, A., & Sedlmeir, F. (2016). Coherent up-conversion of microwave & THz radiation into the telecom regime: Towards the fundamental limit. In A. B. Deb & N. Kjærgaard (Eds.), Proceedings of the Matariki Workshop on Quantum Science. (pp. 25). Retrieved from http://quantum.otago.ac.nz/mqs2016.html Conference Contribution - Published proceedings: Abstract
Schunk, G., Vogl, U., Förtsch, M., Strekalov, D., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2015). Adressing Rb and Cs atomic transitions with single tunable narrowband photon-pair source. Proceedings of the 45th Winter Colloquium on the Physics of Quantum Electronics (PQE). (pp. 215). Retrieved from http://www.pqeconference.com/pqe2015/ Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Rueda, A., Schneidereit, M. F., Preu, S., Mendéz-Aller, M., Räisänen, A. V., … Schwefel, H. G. L. (2015). Efficient up- and down conversion of microwave signals into the optical regime using whispering gallery mode resonators. Proceedings of the 45th Winter Colloquium on the Physics of Quantum Electronics (PQE). (pp. 267). Retrieved from http://www.pqeconference.com/pqe2015/index.shtml Conference Contribution - Published proceedings: Abstract
Schwefel, H. G. L. (2015). Nonlinear frequency conversion in WGM resonators. Proceedings of the 45th Winter Colloquium on the Physics of Quantum Electronics (PQE). (pp. 263). Retrieved from http://www.pqeconference.com/pqe2015/ Conference Contribution - Published proceedings: Abstract
Damm, C., Schwefel, H. G. L., Sedlmeir, F., Hartnagel, H., Preu, S., & Weickhmann, C. (2015). Selected emerging THz technologies. In G. Carpintero, L. García Muñoz, H. Hartnagel, S. Preu & A. Räisänen (Eds.), Semiconductor terahertz technology: Devices and systems at room temperature operation. (pp. 340-382). Chichester, UK: Wiley. Chapter in Book - Research
Schunk, G., Vogl, U., Förtsch, M., Strekalov, D., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2015). Addressing Rb and Cs transitions with a tunable source of photon pairs. Proceedings of the Joint European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference. EB 3.1. Retrieved from https://www.osapublishing.org/conference.cfm?meetingid=90&yr=2015 Conference Contribution - Published proceedings: Abstract
Leuchs, G., Marquardt, C., & Schwefel, H. G. L. (2015). Nonlinear quantum optics in a milimeter size whispering gallery mode resonator. Proceedings of the Nonlinear Optics Conference. NW2A.5. doi: 10.1364/NLO.2015.NW2A.5 Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Zeltner, R., Leuchs, G., & Schwefel, H. G. L. (2015). Small refractive index, high performance: Magnesium fluoride whispering gallery mode resonators for refractometric sensing. Proceedings of the Joint European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference. Retrieved from https://www.osapublishing.org/conference.cfm?meetingid=90&yr=2015 Conference Contribution - Published proceedings: Abstract
Förtsch, M., Schunk, G., Fürst, J. U., Strekalov, D., Gerrits, T., Stevens, M. J., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2015). Highly efficient generation of single-mode photon pairs from a crystalline whispering-gallery-mode resonator source. Physical Review A, 91, 023812. doi: 10.1103/PhysRevA.91.023812 Journal - Research Article
Förtsch, M., Gerrits, T., Stevens, M. J., Strekalov, D., Schunk, G., Fürst, J. U., … Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2015). Near-infrared single-photon spectroscopy of a whispering gallery mode resonator using energy-resolving transition edge sensors. Journal of Optics, 17, 065501. doi: 10.1088/2040-8978/17/6/065501 Journal - Research Article
Schwefel, H. G. L., & Türeci, H. (2015). A chaotic approach clears up imaging: A laser that emits bright, incoherent light provides an ideal light source for imaging [Perspective]. Science, 348(6231), 189-190. doi: 10.1126/science.aaa7409 Journal - Research Other
Rivera-Lavado, A., Preu, S., García-Muñoz, L. E., Generalov, A., Montero-de-Paz, J., Döhler, G., … Sedlmeir, F., … Schwefel, H. G. L., … Räisänen, A. V. (2015). Dielectric rod waveguide antenna as THz emitter for photomixing devices. IEEE Transactions on Antennas & Propagation, 63(3), 882-890. doi: 10.1109/TAP.2014.2387419 Journal - Research Article
Peano, V., Schwefel, H. G. L., Marquardt, C., & Marquardt, F. (2015). Intracavity squeezing can enhance quantum-limited optomechanical position detection through deamplification. Physical Review Letters, 115(24), 243603. doi: 10.1103/PhysRevLett.115.243603 Journal - Research Article
Schunk, G., Vogl, U., Strekalov, D. V., Förtsch, M., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2015). Interfacing transitions of different alkali atoms and telecom bands using one narrowband photon pair source. Optica, 2(9), 773-778. doi: 10.1364/OPTICA.2.000773 Journal - Research Article
Schunk, G., Vogl, U., Förtsch, M., Strekalov, D. V., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2014). Interfacing various atomic transitions and telecom wavelengths with a single tunable narrowband photon-pair source. Proceedings of the 12th International Conference on Quantum Communication, Measurement and Computing (QCMC). B79, (pp. 61). Retrieved from http://qcmc2014.ustc.edu.cn/ Conference Contribution - Published proceedings: Abstract
Förtsch, M., Schunk, G., Fürst, J., Sedlmeir, F., Strekalov, D. V., Schwefel, H. G. L., … Marquardt, C. (2014). Single-mode photon pairs from a crystalline whispering gallery mode resonator. Proceedings of the 12th International Conference on Quantum Communication, Measurement and Computing (QCMC). B28, (pp. 48). Retrieved from http://qcmc2014.ustc.edu.cn/ Conference Contribution - Published proceedings: Abstract
Schwefel, H. G. L. (2014, April). Crystalline WGM resonators: Good for sensing? Verbal presentation at the 560th WE Heraeus Seminar: Taking Detection to the Limit: Biosensing with Optical Microcavities, Bad Honnef, Germany. Conference Contribution - Verbal presentation and other Conference outputs
Méndez-Aller, M., García-Muñoz, L. E., Schwefel, H. G. L., Sedlmeir, F., Schneidereit, M., Rivera-Lavado, A., & Segovia-Vargas, D. (2014, May). Room temperature receiver based on whispering gallery mode resonators for radio astronomy applications. Poster session presented at the 4th European Optical Society (EOS) Topical Meeting on Terahertz Science & Technology, Camogli, Italy. Conference Contribution - Poster Presentation (not in published proceedings)
Hauer, M., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2014, September). Novel types of nonlinear enhancement in uniaxial crystalline whispering gallery mode resonators. Verbal presentation at the Photon14 Conference, London, UK. Conference Contribution - Verbal presentation and other Conference outputs
Schwefel, H. G. L. (2014). Making microwave radiation visible: Phase-matching in non-linear crystalline whispering gallery mode resonators [Invited]. Proceedings of the Progress in Electromagnetic Research Symposium (PIERS). (pp. 503). Retrieved from http://piers.org/piers2014Guangzhou/ Conference Contribution - Published proceedings: Abstract
Schwefel, H. (2014, June). Nonlinear optical properties of whispering gallery mode resonators. Verbal presentation at the Extreme and Quantum Photonics Summer School: Ultrafast Lasers and Applications, Ottawa, Canada. Conference Contribution - Verbal presentation and other Conference outputs
Zeltner, R., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2014). Crystalline MgF2 whispering gallery mode resonators for enhanced bulk index sensitivity. Proceedings of the 560th WE Heraeus Seminar: Taking Detection to the Limit: Biosensing with Optical Microcavities. Retrieved from http://www.vollmerlab.net/workshop.php Conference Contribution - Published proceedings: Abstract
Förtsch, M., Schunk, G., Fürst, J., Sedlmeir, F., Strekalov, D., Schwefel, H. G. L., … Nam, S. W. (2014, July). Narrow-band single-mode photon pairs from a whispering gallery mode resonator. Verbal presentation at the 23rd Annual International Laser Physics (LPHYS) Workshop, Sofia, Bulgaria. Conference Contribution - Verbal presentation and other Conference outputs
Schunk, G., Förtsch, M., Fürst, J. U., Vogl, U., Strekalov, D. V., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2014, July). Identifying modes: Frequency spectra and emission patterns of large whispering-gallery mode resonators. Verbal presentation at the 23rd Annual International Laser Physics (LPHYS) Workshop, Sofia, Bulgaria. Conference Contribution - Verbal presentation and other Conference outputs
Förtsch, M., Schunk, G., Fürst, J. U., Strekalov, D., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2014). High efficient generation of single mode narrow-band photon pairs. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). SYQR4A22.1. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Hauer, M., Fürst, J., Leuchs, G., & Schwefel, H. G. L. (2014). Angle cut, birefrigent whispering gallery mode resonators. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 67.4. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Schneidereit, M. F., Sedlmeir, F., Preu, S., Raisanen, A. V., García-Muñoz, L. E., Leuchs, G., & Schwefel, H. G. L. (2014). Waveguide coupling of high index whispering gallery mode resonators in the THz domain. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 61.7. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Schunk, G., Förtsch, M., Fürst, J., Strekalov, D., Sedlmeir, F., Schwefel, H., … Marquardt, C. (2014). Mode spectrum and emission pattern of whispering gallery mode disk resonators. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 38.7. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Zeltner, R., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2014). Increasing quality through the surrounding: Whispering gallery mode resonators and their environment. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 30.29. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Förtsch, M., Schunk, G., Fürst, J., Sedlmeir, F., Strekalov, D., Schwefel, H. G. L., … Marquardt, C. (2014). Highly efficient generation of narrow-band single-mode photon pairs from a whispering gallery mode resonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). FW3A.6. doi: 10.1364/CLEO_QELS.2014.FW3A.6 Conference Contribution - Published proceedings: Abstract
Zeltner, R., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2014). Refractometric sensing with crystalline MgF2 whispering gallery mode resonators. Proceedings of the Frontiers in Optics Conference. LTh3I.5. doi: 10.1364/LS.2014.LTh3I.5 Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Schneidereit, M. F., Preu, S., Mendéz-Aller, M., Räisänen, A. V., García-Muñoz, L. E., … Schwefel, H. G. L. (2014). Sum and difference frequency generation of optical and microwave photons in a whispering gallery mode resonator. Proceedings of the Frontiers in Optics Conference. FM3B.4. doi: 10.1364/FIO.2014.FM3B.4 Conference Contribution - Published proceedings: Abstract
Vollmer, F., & Schwefel, H. G. L. (2014). Taking detection to the limit with optical microcavities: Recent advances presented at the 560. WE Heraeus Seminar. European Physical Journal Special Topics, 223, 1907-1916. doi: 10.1140/epjst/e2014-02271-2 Journal - Research Other
Zeltner, R., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2014). Crystalline MgF2 whispering gallery mode resonators for enhanced bulk index sensitivity. European Physical Journal Special Topics, 223, 1989-1994. doi: 10.1140/epjst/e2014-02241-8 Journal - Research Article
Schunk, G., Fürst, J. U., Förtsch, M., Strekalov, D. V., Vogl, U., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2014). Identifying modes of large whispering-gallery mode resonators from the spectrum and emission pattern. Optics Express, 22(25), 30795-30806. doi: 10.1364/OE.22.030795 Journal - Research Article
Schwefel, H. G. L. (2014). In optical pumping, less can be more: Creating loss in one optical resonator can initiate lasing in its coupled partner [Perspective]. Science, 346(6207), 304-305. doi: 10.1126/science.1260707 Journal - Research Other
Sedlmeir, F., Zeltner, R., Leuchs, G., & Schwefel, H. G. L. (2014). High-Q MgF2 whispering gallery mode resonators for refractometric sensing in aqueous environments. Optics Express, 22(25), 30934-30942. doi: 10.1364/OE.22.030934 Journal - Research Article
Collodo, M. C., Sedlmeir, F., Sprenger, B., Svitlov, S., Wang, L., Schwefel, H. G. L., & Wang, L. J. (2014). Sub-kHz lasing of a CaF2 whispering gallery mode resonator stabilized fiber ring laser. Optics Express, 22(16), 19277-19283. doi: 10.1364/OE.22.01914119277 Journal - Research Article
Förtsch, M., Gerrits, T., Stevens, M. J., Fürst, J. U., Schunk, G., Sedlmeir, F., Schwefel, H. G. L., … Marquardt, C. (2013). Near-infrared spectroscopy on a single photon level. Proceedings of the Conference on Lasers and Electro-Optics Pacific Rim. ThG3_1. Retrieved from https://www.osapublishing.org/conferences.cfm Conference Contribution - Published proceedings: Full paper
Schwefel, H. (2013, November). Crystalline WGM resonators: Linear and non-linear applications from the visible to THz. Invited presentation at the French-Russian-German Laser Symposium, Besançon, France. Conference Contribution - Verbal presentation and other Conference outputs
Schwefel, H. G. L., Sedlmeir, F., Fürst, J., Hauer, M., Strekalov, D. V., & Leuchs, G. (2013). Polarization in birefringent WGM resonators [Invited]. Proceedings of the 45th Winter Colloquium on the Physics of Quantum Electronics (PQE). (pp. 213). Retrieved from http://www.pqeconference.com/pqe2015/ Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Hauer, M., Fürst, J. U., Strekalov, D. V., & Schwefel, H. G. L. (2013). Complex polarization states of off-axis uniaxial whispering gallery mode resonators. Proceedings of SPIE (Vol. 8600): Laser Resonators, Microresonators, and Beam Control. 86001B . doi: 10.1117/12.2002434 Conference Contribution - Published proceedings: Full paper
Sedlmeir, F., Hauer, M., Fürst, J. U., & Schwefel, H. G. L. (2013). Exploring and exploiting polarization properties of angle cut whispering gallery resonators. Proceedings of the Progress in Electromagnetic Research Symposium (PIERS). (pp. 867). Retrieved from http://piers.org/piers/ Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Hauer, M., Fürst, J. U., & Schwefel, H. G. L. (2013). Broad band second harmonic generation in crystalline whispering gallery mode resonators [Invited]. Proceedings of the Progress in Electromagnetic Research Symposium (PIERS). (pp. 505). Retrieved from http://piers.org/piers/ Conference Contribution - Published proceedings: Abstract
Schunk, G., Förtsch, M., Fürst, J., Strekalov, D., Sedlmeir, F., Schwefel, H., … Leuchs, G. (2013). Wavelength tunability of a triply resonant whispering gallery optical parametric oscillator. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 54.4. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Evers, J., Schmid, S. I., Preu, S., Sedlmeir, F., Leuchs, G., & Schwefel, H. G. L. (2013). Directional emission of dielectric disks with a finite scatterer in the THz regime. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 16.3. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Hauer, M., Fürst, J., Strekalov, D. V., & Schwefel, H. G. L. (2013). Complex polarization in non z-cut whispering gallery mode resonators. Proceedings of the European Conference on Lasers and Electro-Optics Conference. CE_9_3. Retrieved from https://www.osapublishing.org/ Conference Contribution - Published proceedings: Abstract
Breunig, I., Sturman, B., Sedlmeir, F., Schwefel, H. G. L., & Buse, K. (2013). Whispering gallery modes at the rim of an axisymmetric optical resonator: Analytical versus numerical description and comparison with experiment. Optics Express, 21(25), 30683-30692. doi: 10.1364/OE.21.030683 Journal - Research Article
Sedlmeir, F., Hauer, M., Fürst, J. U., Leuchs, G., & Schwefel, H. G. L. (2013). Experimental characterization of an uniaxial angle cut whispering gallery mode resonator. Optics Express, 21(20), 23942-23949. doi: 10.1364/OE.21.023942 Journal - Research Article
Preu, S., Schmid, S. I., Sedlmeir, F., Evers, J., & Schwefel, H. G. L. (2013). Directional emission of dielectric disks with a finite scatterer in the THz regime. Optics Express, 21(14), 16370-16380. doi: 10.1364/OE.21.016370 Journal - Research Article
Kaplan, A., Tomes, M., Carmon, T., Kozlov, M., Cohen, O., Bartal, G., & Schwefel, H. G. L. (2013). Finite element simulation of a perturbed axial-symmetric whispering-gallery mode and its use for intensity enhancement with a nanoparticle coupled to a microtoroid. Optics Express, 21(12), 14169-14180. doi: 10.1364/OE.21.014169 Journal - Research Article
Schwefel, H. G. L., Sedlmeir, F., Strekalov, D. V., Bauerschmidt, S., Preu, S., Malzer, S., … Leuchs, G. (2012, June). Whispering gallery mode resonator based optical up-conversion of THz radiation. Verbal presentation at the 2nd International TERA Conference: Terahertz and Microwave Radiation: Generation, Detection and Applications, Moscow, Russia. Conference Contribution - Verbal presentation and other Conference outputs
Sedlmeir, F., Fürst, J., Strekalov, D., Schwefel, H. G. L., & Leuchs, G. (2012). Elliptically polarized whispering gallery modes in uniaxial crystal resonators. Proceedings of the Frontiers in Optics Conference. FTh1E.7. doi: 10.1364/FIO.2012.FTh1E.7 Conference Contribution - Published proceedings: Abstract
Förtsch, M., Schunk, G., Sedlmeir, F., Fürst, J., Wittmann, C., Strekalov, D., Schwefel, H. G. L., & Marquardt, C. (2012). Widely tunable and compact optical parametric oscillator based on a whispering gallery mode resonator. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 40.3. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Collodo, M. C., Sprenger, B., Sedlmeir, F., Svitlov, S., Schwefel, H. G. L., & Wang, L. J. (2012). Passive ring-laser stabilization to sub-kHz linewidths with whispering gallery mode resonator. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 28.1. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Sedlmeir, F., Strekalov, D., Bauerschmidt, S., Preu, S., Malzer, S., Döhler, G., Schwefel, H. G. L., & Leuchs, G. (2012). Towards highly efficient whispering gallery supported THz detection. Verhandlungen der Deutschen Physikalischen Gesellschaft (DPG). Q 54.55. Retrieved from https://www.dpg-physik.de/veroeffentlichung/verhandlungen/ Conference Contribution - Published proceedings: Abstract
Förtsch, M., Schunk, G., Sedlmeir, F., Fürst, J., Wittmann, C., Strekalov, D., Schwefel, H. G. L., … Leuchs, G. (2012). Mode-hop-free tunable optical parametric oscillator utilizing a whispering gallery mode resonator. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). CW3K.7. doi: 10.1364/CLEO_SI.2012.CW3K.7 Conference Contribution - Published proceedings: Abstract
Collodo, M., Sprenger, B., Sedlmeir, F., Svitlov, S., Schwefel, H. G. L., & Wang, L. J. (2012). Sub-kHz linewidth of crystalline whispering gallery mode resonator stabilized ring-laser. Proceedings of the Conference on Lasers and Electro-Optics (CLEO). CTh3A.5. doi: 10.1364/CLEO_SI.2012.CTh3A.5 Conference Contribution - Published proceedings: Abstract
Kozlov, M., Kfir, O., Fleischer, A., Kaplan, A., Carmon, T., Schwefel, H. G. L., … Cohen, O. (2012). Narrow-bandwidth high-order harmonics driven by long-duration hot spots. New Journal of Physics, 14, 063036. doi: 10.1088/1367-2630/14/6/063036 Journal - Research Article