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Single-photon emission in the near infrared from diamond colour centre

E Wu·V. Jacques·F. Treussart·H. Zeng·P. Grangier·J. -F. Roch
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Abstract

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 780 nm, which is almost entirely concentrated in the zero phonon line even at room temperature. The colour centre excited-state lifetime is as short as 2 ns, and the photoluminescence 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.

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E Wu, V. Jacques, F. Treussart, H. Zeng, P. Grangier, J. -F. Roch. 2005-09-20. Single-photon emission in the near infrared from diamond colour centre. https://doi.org/10.1016/j.jlumin.2005.12.052

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