文献类型：期刊文献

英文题名：Broadband optical nonreciprocity in an N-type thermal atomic system

作者：Fan, Shengfa[1,2];Qi, Yihong[1];Lin, Gongwei[1];Niu, Yueping[1,3];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

年份：2020

卷号：462

外文期刊名：OPTICS COMMUNICATIONS

收录：;EI(收录号：20200408090405);WOS:【SCI-EXPANDED(收录号:WOS:000519848700033)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 11874146, 11774089, 11674094 and 11981260012).

语种：英文

外文关键词：Nonreciprocal propagation; Broadband transmission; Electromagnetically induced transparency; Atomic thermal motion

摘要：Nonreciprocal propagation of light plays a very important role and attracts a great deal of research interest in quantum optics and quantum information sciences for the intriguing physics and the vast prospective applications. In order to enhance the nonreciprocal bandwidth of light, we investigate nonreciprocal propagation of the weak probe field by controlling two strong control fields in a cavity-free N-type thermal Rb87 atomic system. From the theoretical analysis, it is found that, the linewidth of the EIT windows and thus the nonreciprocal bandwidth for the probe field are mainly determined by the intensities of the control fields Omega(1), and Omega(2). For proper Omega(1), nonreciprocal bandwidth of the probe field can be significantly enhanced by increasing Omega(2), which implies the probability of generating more than 100 MHz bandwidth for optical nonreciprocity. The principle experimental demonstration in the Rb87 thermal atomic system is consistent with the theoretical analysis, and we obtain similar to 60 MHz nonreciprocal bandwidth in experiments. Our work may provide references for all-optical nonreciprocal quantum devices such as optical isolator, circulator and router in optical information processing.