Disk-Shaped GaN Quantum Dots Embedded in AlN Nanowires for Room-Temperature Single-Photon Emitters Applicable to Quantum Information Technology

被引：10

作者：

Deng, Jun ^{[1
]}

Yu, Jiadong ^{[1
,2
]}

Hao, Zhibiao ^{[1
,2
]}

Kang, Jianbin ^{[3
]}

Lu, Boyang ^{[1
]}

Wang, Lai ^{[1
,2
]}

Sun, Changzheng ^{[1
,2
]}

Han, Yanjun ^{[1
,2
]}

Xiong, Bing ^{[1
,2
]}

Wang, Jian ^{[1
,2
]}

Li, Hongtao ^{[1
,2
]}

Luo, Yi ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol BNRis, Dept Elect Engn, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Ctr Flexible Elect Technol, Beijing 100084, Peoples R China

[3] China Acad Engn Phys, Microsyst & Terahertz Res Ctr, Chengdu 610200, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2022年 / 5卷 / 03期

基金：

国家重点研发计划; 中国博士后科学基金; 中国国家自然科学基金;

关键词：

single-photon emitter; GaN/AlN; dot-in-wires; selective area growth; exciton-phonon coupling; EXCITON BINDING-ENERGY; PHOTOLUMINESCENCE; EMISSION;

D O I：

10.1021/acsanm.1c04581

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We demonstrate an optically pumped single-photon emitter operating at room temperature based on disk-shaped GaN/AlN quantum dots embedded in the nanowire (dot-in-wire) structure, which can act as an optical source for future quantum information technologies. The disk-like geometry of the quantum dot (QD) leads to well-defined strain distribution and controllable optical properties of the QD structure, which is revealed by theoretical calculations using a continuous elasticity model. Site-controlled GaN/AlN dot-in-wires are grown by selective area growth on prepatterned Ti/N-polar AlN/Si substrates using molecular beam epitaxy. The internal quantum efficiency of GaN QDs is 31.1%, and their photoluminescence (PL) wavelengths are in good agreement with the calculation. Measured by a micro-PL spectroscopy integrated with a Hanbury-Brown and Twiss setup, the second-order correlation at zero time delay (g((2))(0)) reaches 0.19 at room temperature for the site-controlled GaN/AlN dot-in-wires. Our work provides a promising approach to realize high-performance single-photon emission devices on-demand for application in quantum information technology.

引用

页码：4000 / 4008

页数：9

共 55 条

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