5 March 2013 Resonance in quantum dot fluorescence on a band-edge of a 1-D photonic bandgap cholesteric structure under cw-laser excitation
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Proceedings Volume 8642, Emerging Liquid Crystal Technologies VIII; 86420T (2013); doi: 10.1117/12.2021405
Event: SPIE OPTO, 2013, San Francisco, California, United States
Abstract
Microcavity resonance is demonstrated in nanocrystal quantum dot fluorescence in a 1-D chiral photonic bandgap cholesteric liquid crystal host. The resonance demonstrates coupling between quantum dot fluorescence and the cholesteric microcavity. Observed at a band edge of a photonic stopband, 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 ge 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 under pulsed excitation were used, as well as for room-temperature single-photon source applications.
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Svetlana G. Lukishova, Justin M. Winkler, Luke J. Bissell, Carlos R. Stroud, "Resonance in quantum dot fluorescence on a band-edge of a 1-D photonic bandgap cholesteric structure under cw-laser excitation", Proc. SPIE 8642, Emerging Liquid Crystal Technologies VIII, 86420T (5 March 2013); doi: 10.1117/12.2021405; https://doi.org/10.1117/12.2021405
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