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Efficient room-temperature source of polarized single photons

United States Patent

August 7, 2007
View the Complete Patent at the US Patent & Trademark Office
An efficient technique for producing deterministically polarized single photons uses liquid-crystal hosts of either monomeric or oligomeric/polymeric form to preferentially align the single emitters for maximum excitation efficiency. Deterministic molecular alignment also provides deterministically polarized output photons; using planar-aligned cholesteric liquid crystal hosts as 1-D photonic-band-gap microcavities tunable to the emitter fluorescence band to increase source efficiency, using liquid crystal technology to prevent emitter bleaching. Emitters comprise soluble dyes, inorganic nanocrystals or trivalent rare-earth chelates.
Lukishova; Svetlana G. (Honeoye Falls, NY), Boyd; Robert W. (Rochester, NY), Stroud; Carlos R. (Rochester, NY)
University of Rochester (Rochester, NY)
10/ 753,323
January 9, 2004
STATEMENT OF GOVERNMENT INTEREST The research leading to the present invention was supported in part by the U.S. Army Research Office under Award No. DAAD19-02-1-0285. The work was also supported by the U.S. Department of Energy Office of Inertial Confinement Fusion under Cooperative Agreement No. DE-FC03-92SF19460. The government has certain rights in the invention.