期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 26, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.263601
关键词
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资金
- University of Cambridge
- European Research Council (FP7)/ERC Grant [209636]
- FP7 Marie Curie Initial Training Network S3NANO
- European Community [611143]
- EPSRC [EP/J007544/1]
- RUBION, the central unit of the Ruhr-Universitat Bochum
- EPSRC [EP/J007544/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J007544/1] Funding Source: researchfish
- European Research Council (ERC) [209636] Funding Source: European Research Council (ERC)
Spin impurities in diamond can be versatile tools for a wide range of solid-state-based quantum technologies, but finding spin impurities that offer sufficient quality in both photonic and spin properties remains a challenge for this pursuit. The silicon-vacancy center has recently attracted much interest because of its spin-accessible optical transitions and the quality of its optical spectrum. Complementing these properties, spin coherence is essential for the suitability of this center as a spin-photon quantum interface. Here, we report all-optical generation of coherent superpositions of spin states in the ground state of a negatively charged silicon-vacancy center using coherent population trapping. Our measurements reveal a characteristic spin coherence time, T-2*, exceeding 45 nanoseconds at 4 K. We further investigate the role of phonon-mediated coupling between orbital states as a source of irreversible decoherence. Our results indicate the feasibility of all-optical coherent control of silicon-vacancy spins using ultrafast laser pulses.
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