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We report elliptically-polarized fluorescence from colloidal semiconductor quantum dots in a chiral 1-D photonic bandgap microcavity composed of a planar-aligned cholesteric liquid crystal. Antibunched fluorescence proves a polarized single photon source operating at room temperature.
CdSe/PbSe single quantum dots were doped into chiral-photonic-bandgap cholesteric microcavities for visible/telecom wavelengths. High-purity circularly polarized fluorescence of definite handedness from single quantum dots was observed for the first time because of microcavity spiral structure.
CdSe/PbSe single quantum dots were doped into chiral-photonic-bandgap cholesteric microcavities for visible/telecom wavelengths. High-purity circularly polarized fluorescence of definite handedness from single quantum dots was observed for the first time because of microcavity spiral structure.
A single-photon source based on single CdSe quantum-dot fluorescence in a chiral-photonic- bandgap liquid-crystal host manifests itself in observed fluorescence antibunching. Chiral-photonic- bandgap structures will provide deterministically handed, circular-polarized fluorescence, even for emitters without a dipole moment.
Silicon carbide has been proposed for coating applications in advanced reactor designs, so studies of its behavior in the presence of ion irradiation and fission products are of interest. We investigated the retention of He in single crystal 6H SiC as a function of irradiation fluence and annealing temperature using both nuclear reaction analysis (NRA) and time-of-flight elastic recoil detection analysis...
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