文献类型：期刊文献

英文题名：Nonreciprocal Amplification with Four-Level Hot Atoms

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

年份：2019

卷号：123

期号：3

外文期刊名：PHYSICAL REVIEW LETTERS

收录：;EI(收录号：20193107261763);WOS:【SCI-EXPANDED(收录号:WOS:000476696100003)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants No. 11774089, No. 11674094, and No. 11474092) and Shanghai Natural Science Foundation (Grants No. 18DZ2252400, No. 17ZR1442700, and No. 18ZR1410500).

语种：英文

外文关键词：Atoms - Optical communication

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.