Single Photon Source for Quantum Information Based on Single Dye Molecule Fluorescence in Liquid Crystal Host
Svetlana G. Lukishova, Russell P. Knox, Patrick Freivald, Andrew McNamara,
Robert W. Boyd, C. R. Stroud, Jr., Angsar W. Schmid, Kenneth L. Marshall
Mol. Cryst. Liq. Cryst. 454, 403 (2006).
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This paper describes a new application for liquid crystals: quantum information technology.
A deterministically polarized single-photon source that efficiently produces photons exhibiting
antibunching is a pivotal hardware element in absolutely secure quantum communication.
Planar-aligned nematic liquid crystal hosts deterministically align the single dye molecules
which produce deterministically polarized single (antibunched) photons. In addition, 1-D photonic
bandgap cholesteric liquid crystals will increase single-photon source efficiency. The experiments
and challenges in the observation of deterministically polarized fluorescence from single
dye molecules in planar-aligned glassy nematic-liquid-crystal oligomer as well as photon
antibunching in glassy cholesteric oligomer are described for the first time.
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Last modified 13 September 2006