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Physics Seminar - Dr Aidan Arnold

Monday, 15 July 2019

Physics Department

Dr Aidan Arnold

Department of Physics

University of Strathclyde


"Twisting Light to Interact with Atoms"

Structured light, and in particular ‘twisted’ light with orbital angular momentum (OAM), is an important tool for optical manipulation, processing, imaging and both classical and quantum communication. I’ll first discuss how we make twisted light using a spatial light modulator – a programmable phase hologram. We then send tens of milliwatts of twisted light from two lasers at 780nm and 776nm into a hot rubidium vapour and make a milliwatt beam of blue as well as an infrared beam of light via four-wave mixing. Conservation of OAM determines the total OAM carried by the two generated fields – at 420 nm and 5.2 um – but not how it is distributed between them, and we’ll explore what happens.

WHEN: Monday 15 July 2019
WHERE: Room 314, Science 3 Building
TIME: 3.00 pm–4.00 pm

All interested are welcome to attend

Light refreshments to follow in Common Room