首页|Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources

Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources

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  • 国家科技期刊平台
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Cavity-enhanced single quantum dots(QDs)are the main approach towards ultra-high-performance solid-state quantum light sources for scalable photonic quantum technologies.Nevertheless,harnessing the Purcell effect requires precise spectral and spatial alignment of the QDs'emission with the cavity mode,which is challenging for most cavities.Here we have successfully integrated miniaturized Fabry-Perot microcavities with a piezoelectric actuator,and demonstrated a bright single-photon source derived from a deterministically coupled QD within this microcavity.Leveraging the cavity-membrane structures,we have achieved large spectral tunability via strain tuning.On resonance,a high Purcell factor of～9 is attained.The source delivers single photons with simultaneous high extraction efficiency of 0.58,high purity of 0.956(2)and high indistinguishability of 0.922(4).Together with its compact footprint,our scheme facilitates the scalable integration of indistinguishable quantum light sources on-chip,therefore removing a major barrier to the development of solid-state quantum information platforms based on QDs.

Jiawei Yang、Yan Chen、Zhixuan Rao、Ziyang Zheng、Changkun Song、Yujie Chen、Kaili Xiong、Pingxing Chen、Chaofan Zhang、Wei Wu、Ying Yu、Siyuan Yu

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State Key Laboratory of Optoelectronic Materials and Technologies,School of Electronics and Information Technology,Sun Yat-Sen University,Guangzhou 510006,China

Institute for Quantum Science and Technology,College of Science,National University of Defense Technology,Changsha 410073,China

College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

Hunan Key Laboratory of Quantum Information Mechanism and Technology,National University of Defense Technology,Changsha 410073 Hunan,China

Hefei National Laboratory,Hefei 230088,China

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Science and Technology Program of GuangzhouInnovation Program for Quantum Science and TechnologyInnovation Program for Quantum Science and TechnologyNational Key R&D Program of Guangdong ProvinceNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hunan Provincescience and technology innovation Program of Hunan Provinceresearch program of national university of defense technologyresearch program of national university of defense technology

2021030300012021ZD03014002021ZD03016052020B03030200011207444212074433121744472021JJ200512021RC3084ZK21-0122-ZZCX-067

2024

10.1038/s41377-024-01384-7

光:科学与应用(英文版)
中国科学院长春光学精密机械与物理研究所

光:科学与应用(英文版)

CSTPCD
ISSN：2095-5545
年,卷(期)：2024.13(2)
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