We demonstrate optical coupling between a single tin-vacancy (SnV) center in diamond and a free-standing photonic crystal nanobeam cavity. The cavities are fabricated using quasi-isotropic etching and feature experimentally measured quality factors as high as ∼11 000. We investigate the dependence of a single SnV center's emission by controlling the cavity wavelength using a laser-induced gas desorption technique. Under resonance conditions, we observe an intensity enhancement of the SnV emission by a factor of 12 and a 16-fold reduction of the SnV lifetime. Based on the large enhancement of the SnV emission rate inside the cavity, we estimate the Purcell factor for the SnV zero-phonon line to be 37 and the coupling efficiency of the SnV center to the cavity, the β factor, to be 95%. Our work paves the way for the realization of quantum photonic devices and systems based on efficient photonic interfaces using the SnV color center in diamond.

中文翻译：

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金刚石中单个锡空位中心与光子晶体腔的耦合

我们展示了金刚石中单个锡空位 (SnV) 中心与独立光子晶体纳米束腔之间的光学耦合。腔是使用准各向同性蚀刻制造的，并具有高达 11 000 的实验测量质量因子。我们通过使用激光诱导气体解吸技术控制腔波长来研究单个 SnV 中心发射的依赖性。在共振条件下，我们观察到 SnV 发射强度增强了 12 倍，并且 SnV 寿命减少了 16 倍。基于腔内 SnV 发射率的大幅增强，我们估计 SnV 零声子线的 Purcell 因子为 37，并且 SnV 中心与腔的耦合效率，β因子，为 95%。我们的工作为使用金刚石中的 SnV 色心实现基于高效光子接口的量子光子器件和系统铺平了道路。