光致发光
钻石
单光子源
材料科学
氮空位中心
光子
激发
强度(物理)
光子计数
共发射极
产量(工程)
量子产额
量子点
光学
原子物理学
物理
光电子学
复合材料
冶金
荧光
量子力学
作者
E Wu,James R. Rabeau,François Treussart,Heping Zeng,Philippe Grangier,S. Prawer,Jean-François Roch
标识
DOI:10.1080/09500340802267118
摘要
The photoluminescence of a single nickel–nitrogen NE8 color center in a diamond nanocrystal is investigated at room temperature under pulsed excitation by scanning confocal optical microscopy. Photon arrival times are analyzed in terms of the temporal intensity correlation function. Antibunching at short times and bunching behavior for longer times is observed, associated with sub- and super-Poissonian statistics, respectively. The behavior is interpreted by a ‘on–off’ state model, and transition rates between these two states are inferred from intensity correlation measurements realized at different excitation powers. NE8 color center photoluminescence quantum yield is evaluated to be 65%, a value higher than achieved for a nitrogen-vacancy color center, which is, up to now, the most practical single emitter to build a reliable single-photon source at room temperature.
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