Optical properties of a single-colour centre in diamond with a green zero-phonon line

Smith, Jason M and Grazioso, Fabio and Patton, Brian R and Dolan, Philip R and Markham, Matthew L and Twitchen, Daniel J (2011) Optical properties of a single-colour centre in diamond with a green zero-phonon line. New Journal of Physics, 13. ISSN 1367-2630

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    Abstract

    We report the photoluminescence characteristics of a colour centre in diamond grown by plasma-assisted chemical vapour deposition. The colour centre emits with a sharp zero-phonon line at 2.330 eV (λ=532 nm) and a lifetime of 3.3 ns, thus offering potential for a high-speed single-photon source with green emission. It displays a vibronic emission spectrum with a Huang–Rhys parameter of 2.48 at 77 K. Hanbury–Brown and Twiss measurements reveal that the electronic level structure of the defect includes a metastable state that can be populated from the optically excited state.