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Nano Lett. 2008 Dec;8(12):4326-9. doi: 10.1021/nl802160z.

A high-temperature single-photon source from nanowire quantum dots.

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  • 1Nanophysics and Semiconductor Group, CEA/CNRS/Université Joseph Fourier, Institut Néel, 25 rue des Martyrs, 38042 Grenoble cedex 9, France.


We present a high-temperature single-photon source based on a quantum dot inside a nanowire. The nanowires were grown by molecular beam epitaxy in the vapor-liquid-solid growth mode. We utilize a two-step process that allows a thin, defect-free ZnSe nanowire to grow on top of a broader, cone-shaped nanowire. Quantum dots are formed by incorporating a narrow zone of CdSe into the nanowire. We observe intense and highly polarized photoluminescence even from a single emitter. Efficient photon antibunching is observed up to 220 K, while conserving a normalized antibunching dip of at most 36%. This is the highest reported temperature for single-photon emission from a nonblinking quantum-dot source and principally allows compact and cheap operation by using Peltier cooling.

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