Phonon-induced dephasing of chromium color centers in diamond

T. Müller, I. Aharonovich, Z. Wang, X. Yuan, S. Castelletto, S. Prawer, and M. Atatüre
Phys. Rev. B 86, 195210 – Published 30 November 2012

Abstract

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.

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  • Received 27 August 2012

DOI:https://doi.org/10.1103/PhysRevB.86.195210

©2012 American Physical Society

Authors & Affiliations

T. Müller1, I. Aharonovich2, Z. Wang3, X. Yuan3, S. Castelletto4, S. Prawer5, and M. Atatüre1

  • 1Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
  • 2School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA
  • 3HFNL and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
  • 4Centre for Quantum Science and Technology, Department of Physics and Astronomy, Macquarie University, Sydney, New South Wales 2109, Australia
  • 5School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia

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Issue

Vol. 86, Iss. 19 — 15 November 2012

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