Room-temperature single photon sources with definite circular and linear polarizations
ABSTRACT We report experimental results of two room-temperature single photon sources with definite polarization based on emitters
embedded in either cholesteric or nematic liquid crystal hosts. In the first case, a cholesteric 1-D photonic bandgap microcavity
provides circular polarization of definite handedness of single photons from single colloidal semiconductor quantum dots (nanocrystals).
In these experiments, the spectral position of the quantum dot fluorescence maximum is at the bandedge of a photonic bandgap
structure. The host does not destroy fluorescence antibunching of single emitters. In the second case, photons with definite
linear polarization are obtained from single dye molecules doped in a planar-aligned nematic liquid crystal host. The combination
of sources with definite linear and circular polarization states of single photons can be used in a practical implementation
of the BB84 quantum key distribution protocol.
SourceAvailable from: Svetlana Lukishova
Conference Paper: Single photon sources for secure quantum communication[Show abstract] [Hide abstract]
ABSTRACT: This paper introduces quantum communication concepts to the scientists starting to work in the field of quantum optics and quantum information. Several topics are covered: (1) single and entangled photon sources; (2) quantum key distribution protocols; (3) current and future quantum communication networks; (4) experimental realization of singlephoton sources: state-of-the-art. More details on single photon generation and characterization methods are provided on the examples of the author’s results on room-temperature single-photon sources with definite linear and circular polarizations.Fundamentals of Laser Assisted Micro- and Nanotechnologies 2013; 11/2013
[Show abstract] [Hide abstract]
ABSTRACT: Results are presented here towards robust room-temperature single-photon sources based on fluorescence in nanocrystals: colloidal quantum dots, color-center diamonds and doped with trivalent rare-earth ions (TR3+). We used cholesteric chiral photonic bandgap and Bragg-reflector microcavities for single emitter fluorescence enhancement. We also developed plasmonic bowtie nanoantennas and 2D-Si-photonic bandgap microcavities.Journal of Physics Conference Series 01/2015; 594(1). DOI:10.1088/1742-6596/594/1/012005