Single-photon emission in the near infrared from diamond colour centre
Single-photon emission in the near infrared from diamond colour centre
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DOI：
10.1016/j.jlumin.2005.12.052
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发表时间：
2005-09
影响因子：
3.6
通讯作者：
E. Wu;V. Jacques;F. Treussart;H. Zeng;P. Grangier;J. Roch
中科院分区：
文献类型：
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作者：
E. Wu;V. Jacques;F. Treussart;H. Zeng;P. Grangier;J. Roch
在连续波激发下，在天然金刚石中观察到基于镍氮杂质的光学活性色心。光谱分析表明，单发射体在近红外波段（780nm附近）具有窄带发射，即使在室温下，该发射也几乎完全集中在零声子线上。色心激发态寿命短至2ns，光致发光为线偏振光。这些引人注目的特征为基于这种色心发射的触发单光子源的实现铺平了道路，该色心发射非常适合在日光条件下操作的露天单光子量子密钥分发。
Optically active colour centres based on nickel–nitrogen impurities are observed in natural diamond under continuous-wave excitation. The spectral analysis shows that the single emitters have a narrow band emission in the near infrared, around 780nm, which is almost entirely concentrated in the zero phonon line even at room temperature. The colour centre excited-state lifetime is as short as 2ns, and the photoluminescence light is linear polarized. These striking features pave the way to the realization of a triggered single-photon source based on this colour centre emission well suited for open-air single-photon Quantum Key Distribution operating in day-light conditions.