文献类型：期刊文献

英文题名：Nonlinear optical nonreciprocity in a surface plasmon-exciton coupled asymmetric cavity system

作者：Fan, Shengfa[1,2];Zhou, Fengxue[1];Xu, Fei[1,2];Qi, Yihong[1];Niu, Yueping[1,3];Gong, Shangqing[1,3]

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

年份：2022

卷号：76

期号：11

外文期刊名：EUROPEAN PHYSICAL JOURNAL D

收录：;EI(收录号：20224613095883);WOS:【SCI-EXPANDED(收录号:WOS:000879785200004)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 11874146, 12274123 and 12034007).

语种：英文

外文关键词：Excitons - Hybrid systems - Nonlinear optics - Optical communication - Optical properties - Semiconductor quantum dots - Surface plasmons

摘要：Optical nonreciprocity and nonreciprocal devices have attracted great research interest in recent years, due to their important applications in optical communication, information processing, etc. In this work, we investigate optical nonreciprocity in the quantum dot-metal nanoparticle (QD-MNP) hybrid system inside an asymmetric cavity. Due to the optical nonlinear effect, the input-output relationship of the cavity shows a bistable S-shaped curve, which can be employed to achieve optical nonreciprocity in the asymmetric cavity system. Nonlinear interaction between photons and QD excitons can be strengthened by using the surface plasmon effect in the QD-MNP nanostructures, providing the possibility of realizing better performance of optical nonreciprocity compared with the single QDs. Not only the light transmittance is enhanced in one direction while further suppressed in the reverse direction, but also the intensity threshold for generating optical nonreciprocity is also reduced in the hybrid surface plasmon-exciton cavity system. Our work may provide references for novel design and experimental realization of nonlinearity-based optical nonreciprocal devices.