Optical fiber coupling of quantum dot single photon sources

被引：0

作者：

Shang, Xiang-Jun ^{[1
]}

Li, Shu-Lun ^{[1
]}

Ma, Ben ^{[1
]}

Chen, Yao ^{[1
]}

He, Xiao-Wu ^{[1
]}

Ni, Hai-Qiao ^{[1
,2
]}

Niu, Zhi-Chuan ^{[1
,2
]}

机构：

[1] State Key Laborotory for Superlattices and Microsturctures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing,100083, China

[2] Beijing Academy of Quantum Information Sciences, Beijing,100193, China

来源：

Wuli Xuebao/Acta Physica Sinica | 2021年 / 70卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Elementary particle sources - Semiconductor quantum dots - Efficiency - Adhesion - Nanocrystals - Temperature - Photonic crystals - Extraction - Silica - Optical fiber coupling - Optical waveguides - Particle beams;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Semiconductor quantum dot (QD) at low temperature will create excitons with sharp spectral lines for single photon emission. Optical fiber coupling avoids scanning for positioning and vibration influence in low-temperature confocal setup, and is a key technology in realizing the plug-play and componentization of QD single photon sources. For the fiber coupling techniques, the lateral coupling of a photonic crystal cavity or waveguide with a tapered fiber, or normal coupling of a QD chip with a tapered facet fiber in a large numerical aperture has been developed based on mask in a micro-region; however, the above techniques require multi-dimensional precise adjusting in order to avoid abnormally bending a soft fiber to realize alignment and high-efficiency coupling. Ceramic ferrule or silica V-shaped groove-mounted fiber has a large smooth facet and no bending; it can collect light in the normal direction by being aligned with bonding QD chip; V-shaped groove-mounted fiber array also enables a random adhesion and avoid scanning for alignment, which is simple in technique. This work is based on the previous realization of single photon output by random adhesion of few-pair DBR micropillar chip with V-shaped groove-mounted fiber array, and uses many-pair DBR cavity chip with theoretical simulation optimization to improve the normal light extraction and its fiber collection efficiency, and greatly improves the fiber output of single photon count rate. © 2021 Chinese Physical Society.

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