Photophysics of chromium-related diamond single-photon emitters

American Physical Society
Publication Type:
Journal Article
Physical Review A, 2010, 81
Issue Date:
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A detailed study of the photophysical properties of several chromium-related color centers produced within chemical vapor deposition diamond is presented. These emitters show narrow luminescence lines in the range of 740770 nm. Single-photon emission was veri?ed with continuous and pulsed excitation with detected emission rates at saturation in the range of (23)×106 counts/s, while direct lifetime measurements reveal excited state lifetimes for the distinct centers ranging 114 ns. In addition, a number of quantum emitters demonstrate two-level behavior with no bunching present in the second-order correlation function. The three-level systems revealed typically photoluminescence lines with width half-maximum of ~4 nm while the two-level emitters have full width half-maximum of~10 nm at room temperature. In addition, the quantum ef?ciency of the two-level system was measured to be four times higher than that of the three-level system.
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