Polarized and Bright Telecom C-Band Single-Photon Source from InP-Based Quantum Dots Coupled to Elliptical Bragg Gratings

被引：6
|
作者：
Ge, Zhenxuan [1 ,2 ,3 ,4 ]
Chung, Tunghsun [3 ,4 ,5 ]
He, Yu-Ming [1 ,2 ,3 ,4 ,5 ]
Benyoucef, Mohamed [6 ]
Huo, Yongheng [1 ,2 ,3 ,4 ,5 ]
机构：
[1] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Peoples R China
[3] Univ Sci & Technol China, Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China
[4] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phys, Shanghai 201315, Peoples R China
[5] Univ Sci & Technol China, Hefei Natl Lab, Hefei 230088, Peoples R China
[6] Univ Kassel, Ctr Interdisciplinary Nanostruct Sci Technol CINSa, Inst Nanostruct Technol & Analyt INA, D-34132 Kassel, Germany
来源：
NANO LETTERS | 2024年 / 24卷 / 05期
基金：
上海市自然科学基金;
关键词：
quantum dots; telecom C-band; elliptical Bragggratings; polarized; bright single-photon sources; GENERATION; INDISTINGUISHABILITY;
D O I：
10.1021/acs.nanolett.3c04618
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Bright, polarized, and high-purity single-photon sources in telecom wavelengths are crucial components in long-distance quantum communication, optical quantum computation, and quantum networks. Semiconductor InAs/InP quantum dots (QDs) combined with photonic cavities provide a competitive path, leading to optimal single-photon sources in this range. Here, we demonstrate a bright and polarized single-photon source operating in the telecom C-band based on an elliptical Bragg grating (EBG) cavity. With a significant Purcell enhancement of 5.25 +/- 0.05, the device achieves a polarization ratio of 0.986, a single-photon purity of g(2)(0) = 0.078 +/- 0.016, and a single-polarized photon collection efficiency of similar to 24% at the first lens (NA = 0.65) without blinking. These findings suggest that C-band QD-based single-photon sources are potential candidates for advancing quantum communication.
引用
收藏
页码：1746 / 1752
页数：7
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