Fabrication of single nickel-nitrogen (NE8) defect centers in diamond by chemical vapor deposition is demonstrated. Under continuous-wave 745 nm laser excitation single defects were induced to emit single photon pulses at 797 nm with a linewidth of 1.5 nm at room temperature. Photon antibunching of single centers was demonstrated using a Hanbury–Brown and Twiss interferometer. Confocal images revealed approximately 10⁶ optically active sites/cm² in the synthesized films. The controlled fabrication of an NE8 based single photon source in synthetic diamond is important for fiber based quantum cryptography, and potentially linear optics quantum computing.
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机译：演示了通过化学气相沉积法在金刚石中制备单个镍氮（NE8）缺陷中心的方法。在连续波745 nm激光激发下，在室温下诱导单个缺陷发射797 nm处的单光子脉冲，线宽为1.5 nm。使用Hanbury-Brown和Twiss干涉仪演示了单个中心的光子反聚束。共聚焦图像显示在合成膜中大约有10 9光学活性位/ cm 2。合成钻石中基于NE8的单光子源的受控制造对于基于光纤的量子密码学以及潜在的线性光学量子计算非常重要。
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