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

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

2005-09-20

arxiv.org/abs/cond-mat/0509516v1

Physics

Condensed Matter

Other Condensed Matter

Proceedings of PDC'05 conference (Dynamical Processes in Excited States of Solids (DPC'05) August 1st to 5th, 2005, Shanghai,

Scientific paper

10.1016/j.jlumin.2005.12.052

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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