Spectrally pure photon pair generation in asymmetric heterogeneously coupled waveguides

被引：2

作者：

Ding, Xiangyan ^{[1
,2
]}

Ma, Jing ^{[1
,2
]}

Tan, Liying ^{[1
,2
]}

Helmy, Amr S. ^{[3
]}

Kang, Dongpeng ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Sch Astronaut, 92 West Dazhi St, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, 92 West Dazhi St, Harbin 150001, Peoples R China

[3] Univ Toronto, Edward S Rogers Dept Elect & Comp Engn, 10 Kings Coll Rd, Toronto, ON M5S 3G4, Canada

来源：

OPTICS LETTERS | 2021年 / 46卷 / 12期

基金：

加拿大自然科学与工程研究理事会; 中国国家自然科学基金; 中国博士后科学基金;

关键词：

D O I：

10.1364/OL.430988

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, we develop a design methodology to generate spectrally pure photon pairs in asymmetric heterogeneously coupled waveguides by spontaneous parametric down conversion. Mode coupling in a system of waveguides is used to directly tailor the group velocity of a supermode to achieve group velocity matching that is otherwise not allowed by material dispersion. Design examples based on thin film lithium niobate waveguides are provided, demonstrating high spectral purity and temperature tunability. This approach is a versatile strategy applicable to waveguides of different materials and structures, allowing more versatility in single-photon source designs. (C) 2021 Optical Society of America

引用

页码：3000 / 3003

页数：4

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