Carlos R Stroud

US Patent:

20060187993, Aug 24, 2006

Filed:

Jan 9, 2004

Appl. No.:

10/753323

Inventors:

Robert Boyd - Rochester NY, US
Carlos Stroud - rochester NY, US

International Classification:

H01S 3/20

US Classification:

372053000

Abstract:

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.