论文标题
纳米结构钻石中锡胶合中心的光子不可区分性
Photonic indistinguishability of the tin-vacancy center in nanostructured diamond
论文作者
论文摘要
由于其高量子效率，较大的Debye-Waller因子以及与光子纳米结构的兼容性，钻石中的锡接口中心是有望的自旋式界面。基准对其单光子的不可区分性是未来应用的关键挑战。在这里，我们报告了单个光子的生成$ 99.7^{+0.3} _ { - 2.5} \％$ purity和$ 63（9）\％$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $与单个模式波导中的共振兴奋的tin tin-vacancy中心无法区分。我们以$ 1.71（1）$ -ns-ns-long $π$ -pulses为$ 77.1（8）\％$ fidelity获得光学转换的量子控制。适度的purcell增强系数为12，将使无法区分的性能提高到$ 95 $ \％。然后，显示的大于$ 100 $ MS的光谱稳定性将使$ 10^6 $相同光子的字符串生成。
Tin-vacancy centers in diamond are promising spin-photon interfaces owing to their high quantum-efficiency, large Debye-Waller factor, and compatibility with photonic nanostructuring. Benchmarking their single-photon indistinguishability is a key challenge for future applications. Here, we report the generation of single photons with $99.7^{+0.3}_{-2.5}\%$ purity and $63(9)\%$ indistinguishability from a resonantly excited tin-vacancy center in a single-mode waveguide. We obtain quantum control of the optical transition with $1.71(1)$-ns-long $π$-pulses of $77.1(8)\%$ fidelity. A modest Purcell enhancement factor of 12 would enhance the indistinguishability to $95$\%. The greater than $100$ ms spectral stability shown would then enable strings of up to $10^6$ identical photons to be generated.
