title: Resonance in quantum dot fluorescence in a photonic bandgap liquid crystal host.
abstract: Microcavity resonance is demonstrated in nanocrystal quantum dot fluorescence in a one-dimensional (1D) chiral photonic bandgap cholesteric-liquid crystal host under cw excitation. The resonance demonstrates coupling between quantum dot fluorescence and the cholesteric microcavity. Observed at a band edge of a photonic stop band, this resonance has circular polarization due to microcavity chirality with 4.9 times intensity enhancement in comparison with polarization of the opposite handedness. The circular-polarization dissymmetry factor g(e) of this resonance is ~1.3. We also demonstrate photon antibunching of a single quantum dot in a similar glassy cholesteric microcavity. These results are important in cholesteric-laser research, in which so far only dyes were used, as well as for room-temperature single-photon source applications.
authors.affiliation: The Institute of Optics, University of Rochester, Rochester, New York 14627, USA. sluk@lle.rochester.edu
authors.forename: Svetlana G
authors.initials: SG
authors.lastname: Lukishova
authors.forename: Luke J
authors.initials: LJ
authors.lastname: Bissell
authors.forename: Justin
authors.initials: J
authors.lastname: Winkler
authors.forename: C R
authors.initials: CR
authors.lastname: Stroud
mesh_terms: D002784:Cholesterol / Q000737:chemistry*; D004867:Equipment Design; D005453:Fluorescence; D005454:Fluorescence Polarization; D007834:Lasers; D050866:Liquid Crystals / Q000737:chemistry*; D008859:Microscopy, Polarization / Q000295:instrumentation* / Q000379:methods; D017785:Photons; D045663:Quantum Dots; D013237:Stereoisomerism
chemical_list: D002784:Cholesterol