Phonon-induced dephasing of chromium color centers in diamond

被引：17

作者：

Mueller, T. ^{[1
]}

Aharonovich, I. ^{[2
]}

Wang, Z. ^{[3
,4
]}

Yuan, X. ^{[3
,4
]}

Castelletto, S. ^{[5
]}

Prawer, S. ^{[6
]}

Atatuere, M. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[3] Univ Sci & Technol China, HFNL, Hefei 230026, Peoples R China

[4] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China

[5] Macquarie Univ, Dept Phys & Astron, Ctr Quantum Sci & Technol, Sydney, NSW 2109, Australia

[6] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 19期

基金：

欧洲研究理事会;

关键词：

TEMPERATURE-DEPENDENCE;

D O I：

10.1103/PhysRevB.86.195210

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

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