Lifetime Reduction of Single Germanium-Vacancy Centers in Diamond via a Tunable Open Microcavity

Rigel Zifkin, César Daniel Rodríguez Rosenblueth, Erika Janitz, Yannik Fontana, Lilian Childress
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Abstract

Coupling between a single quantum emitter and an optical cavity presents a key capability for future quantum networking applications. Here, we explore interactions between individual germanium-vacancy (GeV) defects in diamond and an open microcavity at cryogenic temperatures. Exploiting the tunability of our microcavity system to characterize and select emitters, we observe a Purcell-effect-induced lifetime reduction of up to 4.5±0.3 and extract coherent-coupling rates up to 360±20 MHz. Our results indicate that the GeV defect has favorable optical properties for cavity coupling, with a quantum efficiency of at least 0.34±0.05 and likely much higher.

Abstract Image

通过可调谐开放式微腔缩短金刚石中单锗空穴的寿命
单个量子发射器与光腔之间的耦合是未来量子网络应用的关键能力。在这里,我们探索了金刚石中单个锗空穴(GeV)缺陷与低温开放微腔之间的相互作用。利用我们微腔系统的可调谐性来表征和选择发射器,我们观察到珀塞尔效应诱发的寿命降低高达 4.5±0.3 并提取出高达 360±20 MHz 的相干耦合率。我们的研究结果表明,GeV 缺陷具有空腔耦合的良好光学特性,量子效率至少为 0.34±0.05,甚至可能更高。
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