Dr Sonja Franke Arnold (University of Glasgow)
Since (at least) a
quarter of a century researchers are fascinated by twisted light, i.e. light
that carries orbital angular momentum. I am one of them!
At Glasgow we routinely
use a variety of techniques to imprint structure in the spatial amplitude, phase
and polarisation of a light beam. In my team we specialise on the
interaction of structured light with (rubidium) atoms: from cold ones at tens
of Microkelvin to atomic gasses at room temperature and above. I will
talk about three of our experiments: (1) how to imprint and read-out 3D
structures into a room temperature rubidium vapour, (2) the conversion of
twisted light from the near infrared to blue based on four wave mixing in a
warm vapour cell and (3) imprinting of optical phase and polarisation information
into ground state coherences of cold atoms.