Techniques for Coherent Control of Effective Photon-Photon Interactions at Low Light Levels

Coherent Control;Low light levels;photon-photon interactions;cold atoms

Vickers, Cameronaffiliation1:Faculty of Science ; advisor:Bajcsy, Michal ; Bajcsy, Michal ;

University of Waterloo

关键词: Low light levels;    Master Thesis;    photon-photon interactions;    Coherent Control;    cold atoms;   

Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/14454/5/Vickers_Cameron.pdf

瑞士|英语

来源: UWSPACE Waterloo Institutional Repository

【 摘 要 】

This thesis proposes improvements on techniques for the coherent control of photon-photon interactions mediated by a cloud of cold atoms.Atoms cooled and trapped in a MOT can be loaded into a hollow, photonic crystal waveguide to ensure light coupled into the waveguide is localized on the tightly confined atoms.The low temperature of the atoms decreases decoherence rates, and improves coherent light-matter interactions, such as electromagnetically induced transparency and slow light.Predictions are made for two future experiments using this system, modulating of the phase of a laser beam with a much weaker one, and modulating the transmission of a laser through two photon absorption.These predictions indicate that the phase of a 0.1μW laser beam can be modulated by as much as one milliradian per weak laser photon, and that a800pW laser beam can modulate the transmission of a comparably powerful laser by as much as 60%.Both of these predictions would be improvements on results for similar experiments performed with warm atoms.