Nonreciprocal Amplification with Four-Level Hot Atoms

被引：105

作者：

Lin, Gongwei ^{[1
]}

Zhang, Shicheng ^{[1
,2
]}

Hu, Yiqi ^{[1
,2
]}

Niu, Yueping ^{[1
,3
]}

Gong, Jiangbin ^{[4
]}

Gong, Shangqing ^{[1
,3
]}

机构：

[1] East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

[2] East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

[3] Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

[4] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 03期

基金：

中国国家自然科学基金;

关键词：

NON-RECIPROCITY; OPTICAL ISOLATION; ISOLATORS;

D O I：

10.1103/PhysRevLett.123.033902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Optical nonreciprocity is of paramount importance to optical signal processing and one-way optical communication. Here, we theoretically and experimentally demonstrate nonreciprocal amplification based on four-level hot atoms by exploiting atomic Doppler shifts. Our approach is simple and easy to implement. In fair agreement with our theoretical modeling, forward power amplification of 26 dB and backward isolation of 30 dB are observed. Our results will open up a new avenue towards realistic devices based on nonreciprocal amplification.

引用

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