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Enhanced single-photon emission in the near infrared from a diamond color center

Igor Aharonovich, Chunyuan Zhou, Alastair Stacey, Julius Orwa, Stefania Castelletto, David Simpson, Andrew D. Greentree, François Treussart, Jean-Francois Roch and Steven Prawer; Phys. Rev. B 79, 235316 (2009)

Individual color centers in diamond are promising for near-term quantum technologies including quantum key distribution and metrology. Here we show fabrication of an asyet uncharacterized nickel related complex in diamond, which has photophysical properties surpassing the two main-stay centers for single photon applications, namely the nitrogen vacancy and NE8 center. This center was fabricated using focused ion beam implantation of nickel into isolated chemical vapor deposited diamond crystals. A possible correlation of the center to a Ni/Si complex is substantiated by a co-implantation of Ni and Si into a pure bulk diamond. Room temperature photoluminescence studies reveal a narrow emission in the near infrared region centered at 768 nm with a lifetime as short as 2 ns.

doi: 10.1103/PhysRevB.79.235316
arXiv:0902.3051v1 [cond-mat.mtrl-sci]

ACKNOWLEDGMENTS
This work was supported by the Australian Research Council, The International Science Linkages Program of the Australian Department of Innovation, Industry, Science and Research, the European Union under the EQUIND Project No. IST-034368 and NEDQIT ERANET Nano-Sci projects, and by the French Agence Nationale de la Recherche PROSPIQ project Project No. ANR-06-NANO-041. A.D.G. acknowledges financial support from the Australian Research Council Project No. DP0880466. I.A. acknowledges ARNAM and ARC for their financial support and C.Z. acknowledges support from the Foundation EADS. The authors are thankful to Daniel Twitchen for helpful discussions, and to Wolfgang Pilz and Lothar Bischoff for the help with the FIB.

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