Liu Yan, Chen Gengxu, Song Min, Ci Xueting, Wu Botao, Wu E, Zeng Heping
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
Opt Express. 2013 May 20;21(10):12843-8. doi: 10.1364/OE.21.012843.
We report on a novel method to fabricate single, multiple and large-area high-density ensembles of nitrogen vacancy (NV) color centers in synthetic type Ib bulk diamond by femtosecond laser illumination. Electron beams generated in propagation of intense infrared laser pulses in air sputtered on a diamond sample under high temperature aroused by the laser illumination, creating NV color centers. Typical photoluminescence (PL) spectra of NV centers could be observed on the illuminated spots. Photon streams from individual photoluminescent points exhibited anti-bunching effect by the second-order correlation measurement, evidencing single and multiple photon-emitters around the laser illuminated spots.
我们报道了一种通过飞秒激光照射在合成 Ib 型块状金刚石中制造单个、多个和大面积高密度氮空位（NV）色心集合体的新方法。在高温下，由激光照射激发的强红外激光脉冲在空气中传播时产生的电子束溅射在金刚石样品上，从而产生 NV 色心。在照射点可以观察到 NV 中心典型的光致发光（PL）光谱。通过二阶关联测量，来自各个光致发光点的光子流表现出反聚束效应，证明在激光照射点周围存在单光子和多光子发射体。
