具有确定性集成量子点的明亮电接触圆形布拉格光栅谐振器
Bright electrically contacted circular Bragg grating resonators with deterministically integrated quantum dots
AI总结：
本文将CBG与PIN二极管结合，制备确定性集成单量子点的电接触谐振器，实现可调谐发射、30.4%光子提取效率及高单光子纯度。
摘要：
电控半导体量子点的腔增强发射对于开发面向实际量子光子应用的明亮量子器件至关重要。通过将圆形布拉格光栅（CBG）方法与PIN二极管结构相结合，我们提出并实现了一种基于脊的电接触CBG谐振器创新概念。通过在数值模拟中精细调节器件参数并进行确定性纳米加工，我们制备出具有优异电光发射特性的电控单量子点CBG谐振器。这些特性包括多条波长可调谐发射谱线以及高达（30.4±3.4）%的光子提取效率（PEE）；基于实验结果的精细数值优化表明其可获得显著提升，有望实现PEE>50%。此外，所开发的量子光源产生的单光子纯度达到（98.8±0.2）%（后选择后：（99.5±0.3）%），光子不可分辨性为（25.8±2.1）%（后选择后：（92.8±4.8）%）。我们的结果为兼具腔增强与确定性电荷环境控制的高性能量子器件铺平了道路，推动了复杂量子中继器网络等光子量子信息系统的发展。
英文摘要：
Cavity-enhanced emission of electrically controlled semiconductor quantum dots is essential in developing bright quantum devices for real-world quantum photonic applications. Combining the circular Bragg grating (CBG) approach with a PIN-diode structure, we propose and implement an innovative concept for ridge-based electrically-contacted CBG resonators. Through fine-tuning of device parameters in numerical simulations and deterministic nanoprocessing, we produced electrically controlled single quantum dot CBG resonators with excellent electro-optical emission properties. These include multiple wavelength-tunable emission lines and a photon extraction efficiency (PEE) of up to (30.4$\pm$3.4)%, where refined numerical optimization based on experimental findings suggests a substantial improvement, promising PEE >50%. Additionally, the developed quantum light sources yield single-photon purity reaching (98.8$\pm$0.2)% [post-selected: (99.5$\pm$0.3)%] and a photon indistinguishability of (25.8$\pm$2.1)% [post-selected: (92.8$\pm$4.8)%]. Our results pave the way for high-performance quantum devices with combined cavity enhancement and deterministic charge-environment controls, advancing the development of photonic quantum information systems such as complex quantum repeater networks.
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