Wavelength-tunable high-fidelity entangled photon sources enabled by dual Stark effects

被引：10

作者：

Chen, Chen ^{[1
]}

Yan, Jun-Yong ^{[1
]}

Babin, Hans-Georg ^{[2
]}

Wang, Jiefei ^{[3
]}

Xu, Xingqi ^{[3
]}

Lin, Xing ^{[1
]}

Yu, Qianqian ^{[4
]}

Fang, Wei ^{[5
]}

Liu, Run-Ze ^{[6
,7
]}

Huo, Yong-Heng ^{[6
,7
]}

Cai, Han ^{[5
]}

Sha, Wei E. I. ^{[1
]}

Zhang, Jiaxiang ^{[8
]}

Heyn, Christian ^{[9
]}

Wieck, Andreas D. ^{[2
]}

Ludwig, Arne ^{[2
]}

Wang, Da-Wei ^{[3
,10
]}

Jin, Chao-Yuan ^{[1
]}

Liu, Feng ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Informat Sci & Elect Engn, State Key Lab Extreme Photon & Instrumentat, Hangzhou 310027, Peoples R China

[2] Ruhr Univ Bochum, Lehrstuhl Angew Festkorperphys, D-44801 Bochum, Germany

[3] Zhejiang Univ, Sch Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China

[4] Zhejiang Lab, Hangzhou 311100, Peoples R China

[5] Zhejiang Univ, Coll Opt Sci & Engn, Hangzhou 310027, Peoples R China

[6] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Hefei 230026, Peoples R China

[7] Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Peoples R China

[8] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Natl Key Lab Mat Integrated Circuits, Shanghai 200050, Peoples R China

[9] Univ Hamburg, Ctr Hybrid Nanostruct CHyN, Luruper Chaussee 149, D-22761 Hamburg, Germany

[10] Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China

来源：

NATURE COMMUNICATIONS | 2024年 / 15卷 / 01期

基金：

中国国家自然科学基金;

关键词：

INDISTINGUISHABLE SINGLE PHOTONS; QUANTUM; GENERATION;

D O I：

10.1038/s41467-024-50062-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The construction of a large-scale quantum internet requires quantum repeaters containing multiple entangled photon sources with identical wavelengths. Semiconductor quantum dots can generate entangled photon pairs deterministically with high fidelity. However, realizing wavelength-matched quantum-dot entangled photon sources faces two difficulties: the non-uniformity of emission wavelength and exciton fine-structure splitting induced fidelity reduction. Typically, these two factors are not independently tunable, making it challenging to achieve simultaneous improvement. In this work, we demonstrate wavelength-tunable entangled photon sources based on droplet-etched GaAs quantum dots through the combined use of AC and quantum-confined Stark effects. The emission wavelength can be tuned by similar to 1 meV while preserving an entanglement fidelity f exceeding 0.955(1) in the entire tuning range. Based on this hybrid tuning scheme, we finally demonstrate multiple wavelength-matched entangled photon sources with f > 0.919(3), paving the way towards robust and scalable on-demand entangled photon sources for quantum internet and integrated quantum optical circuits.

引用

页数：9

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