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

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

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Electronics and Information Technology,Sun Yat-Sen University,Guangzhou 510006,China [2]Institute for Quantum Science and Technology,College of Science,National University of Defense Technology,Changsha 410073,China [3]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China [4]Hunan Key Laboratory of Quantum Information Mechanism and Technology,National University of Defense Technology,Changsha 410073 Hunan,China [5]Hefei National Laboratory,Hefei 230088,China

出　　处：《Light(Science & Applications)》2024年第2期325-332,共8页光（科学与应用)（英文版）

基　　金：We acknowledge Jin Liu and Yu-Ming He for the valuable discussions.We are grateful for financial support from the Science and Technology Program of Guangzhou(202103030001);the Innovation Program for Quantum Science and Technology(2021ZD0301400,2021ZD0301605);the National Key R&D Program of Guang-dong Province(2020B0303020001);the National Natural Science Foundation of China(12074442,12074433,12174447);the Natural Science Foundation of Hunan Province(2021JJ20051);the science and technology innovation Program of Hunan Province(2021RC3084);the research program of national university of defense technology(ZK21-01,22-ZZCX-067).

摘　　要：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.

关 键 词：quantum removing PURITY 

分 类 号：O41[理学—理论物理]