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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.

作者信息

Wijitpatima Setthanat, Auler Normen, Mudi Priyabrata, Funk Timon, Barua Avijit, Shrestha Binamra, Schall Johannes, Limame Imad, Rodt Sven, Reuter Dirk, Reitzenstein Stephan

机构信息

Institute of Solid State Physics, Technische Universität Berlin, Hardenbergstraße 36, Berlin 10623, Germany.

Department of Physics, Paderborn University, Warburger Str. 100, 33098 Paderborn, Germany.

出版信息

ACS Nano. 2024 Nov 19;18(46):31834-31845. doi: 10.1021/acsnano.4c07820. Epub 2024 Nov 5.

DOI:10.1021/acsnano.4c07820
PMID:39498511
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11580368/
Abstract

Cavity-enhanced emission of electrically controlled semiconductor quantum dots (QDs) is essential in the development of 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 designs for ridge-based electrically contacted QD-CBG resonators. Through fine-tuning of device parameters in numerical simulations and deterministic nanoprocessing, we produced electrically controlled single QD-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(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 99.2(2)% and photon indistinguishability of 75(5)% under quasi-resonant p-shell excitation. Our results present high-performance quantum devices with combined cavity enhancement and deterministic charge-environment controls, which are relevant for the development of photonic quantum information systems such as complex quantum repeater networks.

摘要

腔增强电控半导体量子点（QD）发射对于开发用于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，我们提出并实现了基于脊的电接触QD-CBG谐振器的设计。通过在数值模拟和确定性纳米加工中对器件参数进行微调，我们制造出了具有优异电光发射特性的电控单QD-CBG谐振器。这些特性包括多条波长可调发射线和高达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有望大幅提高，使PEE > 50%。此外，所开发的量子光源在准共振p壳层激发下产生的单光子纯度达到99.2(2)%，光子不可区分度为75(5)%。我们的结果展示了具有腔增强和确定性电荷环境控制相结合的高性能量子器件，这与诸如复杂量子中继器网络等光子量子信息系统的发展相关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/dec886026c6d/nn4c07820_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/d09e63f1f624/nn4c07820_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/9bbce2f61173/nn4c07820_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/1dca0f727367/nn4c07820_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/1c33c620767a/nn4c07820_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/0b70abb00059/nn4c07820_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/e0622c4c8dac/nn4c07820_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/dec886026c6d/nn4c07820_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/d09e63f1f624/nn4c07820_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/9bbce2f61173/nn4c07820_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/1dca0f727367/nn4c07820_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/1c33c620767a/nn4c07820_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/0b70abb00059/nn4c07820_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/e0622c4c8dac/nn4c07820_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a80/11580368/dec886026c6d/nn4c07820_0007.jpg

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Optical Transparency Induced by a Largely Purcell Enhanced Quantum Dot in a Polarization-Degenerate Cavity.
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