文献类型：期刊文献

英文题名：Reconfigurable nonreciprocity with low insertion loss using a simple two-level system

作者：Hu, Yiqi[1,2];Zhang, Shicheng[1];Kuang, Xinyi[1];Qi, Yihong[1];Lin, Gongwei[1];Gong, Shangqing[1,3];Niu, Yueping[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

年份：2020

卷号：28

期号：26

起止页码：38710

外文期刊名：OPTICS EXPRESS

收录：;EI(收录号：20205109646739);WOS:【SCI-EXPANDED(收录号:WOS:000600667300020)】；

基金：National Natural Science Foundation of China (11674094, 11774089, 11874146, 11974109, 12034007); Natural Science Foundation of Shanghai (17ZR1442700, 18ZR1410500, 20YF1410800).

语种：英文

外文关键词：Insertion losses

摘要：Nonreciprocal light propagation is essential to control the direction of the light flow. Here, we report the realization of magnetic-free optical nonreciprocity using a simple two-level system driven by a pump field in warm atoms. In our experiment, we not only demonstrate less than 0.5 dB of insertion loss and up to 20 dB of isolation but also provide flexible and reconfigurable operations of the isolation bandwidth, frequency, and direction. Nonreciprocal scheme with these characteristics may find important applications in photonic devices. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement