金刚石中氮空位中心的空穴辅助共振荧光

IF 6.6 1区 物理与天体物理 Q1 PHYSICS, APPLIED
Viktoria Yurgens, Yannik Fontana, Andrea Corazza, Brendan J. Shields, Patrick Maletinsky, Richard J. Warburton
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引用次数: 0

摘要

金刚石中的氮空位中心具有光学可寻址和电子自旋寿命长的特点,是产生远距离纠缠态的诱人资源。然而,其相干光子发射的本机分数较低,约为 3%,这削弱了可实现的自旋-光子纠缠率。在这里,我们将一个具有窄外扩线宽(159 MHz)的氮空穴中心与一个开放式微腔耦合在一起,该中心位于一个微米薄的膜中。由此产生的珀塞尔因子(Purcell factor)约为 1.8,将零声子线分数提高到 44% 以上。在普赛尔机制下运行,再加上对零声子线光子的有效收集,使得共振荧光首次可以在没有任何时间滤波的情况下被检测到。我们的信号与激光背景比达到了 10。与最先进的实现方法相比,这种对中心零声子级跃迁的选择性增强可将自旋-自旋纠缠成功概率提高一个数量级,并实现强大的量子光学技术,如波包整形或全光自旋操纵。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond

Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond

The nitrogen-vacancy center in diamond is an attractive resource for the generation of remote entangled states owing to its optically addressable and long-lived electronic spin. However, its low native fraction of coherent photon emission, ~3%, undermines the achievable spin-photon entanglement rates. Here, we couple a nitrogen-vacancy center with a narrow extrinsically-broadened linewidth (159 MHz), hosted in a micron-thin membrane, to an open microcavity. The resulting Purcell factor of ~1.8 increases the zero-phonon line fraction to over 44%. Operation in the Purcell regime, together with an efficient collection of the zero-phonon-line photons, allows resonance fluorescence to be detected for the first time without any temporal filtering. We achieve a >10 signal-to-laser background ratio. This selective enhancement of the center’s zero-phonon transitions could increase spin-spin entanglement success probabilities beyond an order of magnitude compared to state-of-the-art implementations, and enable powerful quantum optics techniques such as wave-packet shaping or all-optical spin manipulation.

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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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