Color centers in diamond are widely recognized as a promising solid state platform for quantum cryptography and quantum information processing. For these applications, single photon sources with a high intensity and reproducible fabrication methods are required. Here, we report a novel color center in diamond, composed of a germanium (Ge) and a vacancy (V) and named the GeV center, which has a sharp and strong photoluminescence band with a zero-phonon line at 602 nm at room temperature. We demonstrate this new color center works as a single photon source. Both ion implantation and chemical vapor deposition techniques enabled fabrication of GeV centers in diamond. A first-principles calculation revealed the atomic crystal structure and energy levels of the GeV center.
@article{arxiv.1503.04938,
title = {A Germanium-Vacancy Single Photon Source in Diamond},
author = {Takayuki Iwasaki and Fumitaka Ishibashi and Yoshiyuki Miyamoto and Yuki Doi and Satoshi Kobayashi and Takehide Miyazaki and Kosuke Tahara and Kay D. Jahnke and Lachlan J. Rogers and Boris Naydenov and Fedor Jelezko and Satoshi Yamasaki and Shinji Nagamachi and Toshiro Inubushi and Norikazu Mizuochi and Mutsuko Hatano},
journal= {arXiv preprint arXiv:1503.04938},
year = {2015}
}
Comments
Main text: 16 pages, 5 figure and Supplementary information: 5 pages, 4 figures