We report on the coherence properties of single photons from chromium-based color centers in diamond. We use field-correlation and spectral line-shape measurements to reveal the interplay between slow spectral wandering and fast dephasing mechanisms as a function of temperature. The zero-phonon transition frequency and its linewidth follow a power-law dependence on temperature, which is consistent with direct electron-phonon coupling and phonon-modulated Coulomb coupling to nearby impurities, which are the predominant fast dephasing mechanisms for these centers. Further, the observed reduction in the quantum yield for photon emission as a function of temperature suggests the opening of additional nonradiative channels through thermal activation to higher-energy states and indicates a near-unity quantum efficiency at 4 K.
|Number of pages||6|
|Journal||Physical Review B: Condensed Matter and Materials Physics|
|Publication status||Published - 2012|
Bibliographical noteMüller, T., Aharonovich, I., Wang, Z., Yuan, X., Castelletto, S., Prawer, S., and Atatüre, M. (2012). Physical review B. Condensed matter and materials physics, Vol. 86, Issue 19, article no. 195210. Copyright 2012 by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevB.86.195210
Müller, T., Aharonovich, I., Wang, Z., Yuan, X., Castelletto, S., Prawer, S., & Atatüre, M. (2012). Phonon-induced dephasing of chromium color centers in diamond. Physical Review B: Condensed Matter and Materials Physics, 86(19), 195210-1-195210-6. https://doi.org/10.1103/PhysRevB.86.195210