Quantum Interference of Resonance Fluorescence from Germanium-Vacancy Color Centers in Diamond,Nano Letters

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Quantum Interference of Resonance Fluorescence from Germanium-Vacancy Color Centers in Diamond
Nano Letters ( IF 9.6 ) Pub Date : 2022-08-01 , DOI: 10.1021/acs.nanolett.2c01959
Disheng Chen _{1,

2} , Johannes E Fröch ₃ , Shihao Ru _{1,

4} , Hongbing Cai _{1,

2} , Naizhou Wang _{1,

2} , Giorgio Adamo ₂ , John Scott _{3,

5} , Fuli Li ₄ , Nikolay Zheludev _{1,

2,

6} , Igor Aharonovich _{3,

5} , Weibo Gao _{1,

2,

7}

Affiliation

Resonance fluorescence from a quantum emitter is an ideal source to extract indistinguishable photons. By using the cross-polarization to suppress the laser scattering, we observed resonance fluorescence from GeV color centers in diamond at cryogenic temperature. The Fourier-transform-limited line width emission with T₂/2T₁ ∼ 0.86 allows for two-photon interference based on single GeV color center. Under pulsed excitation, the separated photons exhibit a Hong–Ou–Mandel quantum interference above classical limit, whereas the continuous-wave excitation leads to a coalescence time window of 1.05 radiative lifetime. In addition, we demonstrated a single-shot readout of spin states with a fidelity of 74%. Our experiments lay down the foundation for building a quantum network with GeV color centers in diamond.

中文翻译：

金刚石中锗空位色心共振荧光的量子干涉

来自量子发射器的共振荧光是提取难以区分的光子的理想来源。通过使用交叉极化来抑制激光散射，我们在低温下观察到来自金刚石中 GeV 色心的共振荧光。具有T ₂ /2 T ₁的傅里叶变换限制线宽发射∼ 0.86 允许基于单一 GeV 色心的双光子干涉。在脉冲激发下，分离的光子表现出高于经典极限的 Hong-Ou-Mandel 量子干涉，而连续波激发导致 1.05 辐射寿命的聚结时间窗口。此外，我们展示了自旋状态的单次读数，保真度为 74%。我们的实验为在钻石中建立具有 GeV 色心的量子网络奠定了基础。

更新日期：2022-08-01

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