文献类型：期刊文献

英文题名：Noiseless single-photon isolator at room temperature

作者：Zhang, Shicheng[1];Zhan, Yifan[1];Gong, Shangqing[1,2,3];Niu, Yueping[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China;[3]Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Shanghai 200237, Peoples R China

年份：2023

卷号：6

期号：1

外文期刊名：COMMUNICATIONS PHYSICS

收录：;EI(收录号：20230613566188);WOS:【SCI-EXPANDED(收录号:WOS:000929054600001)】；

基金：We acknowledge the support of the National Natural Science Foundation of China (Grants No. 12004112, 11774089, and 11974109), Shanghai Natural Science Foundation (Grant No. 17ZR1442700) and Shanghai Sailing Program (Grant No. 20YF1410800). The work is also sponsored by "Chenguang Program" supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission (Grant No. 20CG35).

语种：英文

外文关键词：Optical communication - Particle beams - Photons - Pumping (laser)

摘要：The single-photon isolator is in high demand for optical communications and optical information processing in the quantum regime, but the noise is still a limitation. Here, the author theoretically propose a noiseless single-photon isolator scheme and demonstrate experimentally using hot atoms. Nonreciprocal devices, such as isolators, are of great importance for optical communication and optical information processing. To bypass the limitation of a strong magnetic field imposed by the traditional Faraday magneto-optic effect, many alternative mechanisms have been proposed to demonstrate magnetic-free nonreciprocity. However, limited by the drive-induced noise, the noiseless isolator capable of working in the quantum regime has yet to be realized in the experiment. Here, we show a noiseless all-optical isolator with genuine single photons in hot atoms. We experimentally study this mechanism using an open V-type level scheme and demonstrate a low insertion loss of 0.6 dB and high isolation of 30.3 dB with bandwidth up to hundreds of megahertz. Furthermore, the nonreciprocal direction can be truly reversed only by tuning the frequency of the pump laser with the same setup. Our scheme relies on widely used optical technology and is thus universal and robust.