Abstract
Single photon emitters (SPE) are essential building blocks for proposed quantum technologies. An ideal SPE emits only one photon at a time and the photons are indistinguishable. CdSe core/shell quantum dots (QDs) provide a physical system that approximates a SPE. We discuss progress to improve the SPE properties of CdSe QDs. We present synthesis and spectroscopic analysis of wurtzite-CdSe/CdS, mixed shell CdSe/Cd_0.5Zn_0.5S, and continuously graded CdSe/Cd_xZn_1-xSe/ZnSe_yS_1-y QDs. We compare their behaviors at room and cryogenic temperatures using photoluminescence spectroscopy, Michelson interferometry, and Hanbury Brown and Twiss interferometry. We also address efforts to mitigate undesirable behaviors observed in QDs such as charging.
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