文献类型：期刊文献

英文题名：Quantum Nonlinear Nonreciprocity in a Cavity-Coupled Quantum Dot-Metal Nanoparticle Hybrid System

作者：Li, Zeyou[1];Yang, Han[1];Xu, Fei[1];Wang, Peng[2];Qi, Yihong[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Anqing Normal Univ, Sch Elect Engn & Intelligent Mfg, Anqing 246113, Peoples R China

年份：2026

卷号：13

期号：6

外文期刊名：PHOTONICS

收录：;EI(收录号：20262621008092);WOS:【SCI-EXPANDED(收录号:WOS:001802242800001)】；

基金：This research was funded by the National Natural Sciences Foundation of China (Grant Nos. 12274123 and 11874146) and the Anhui Provincial Universities Natural Science Research Project (Grant No. KJ2019A0567).

语种：英文

外文关键词：optical nonreciprocity; single-photon; optical bistability; surface plasmon

摘要：Optical nonreciprocity (ONR) plays an important role in laser technique, optical communications, quantum information, etc. Realizing ONR at the quantum level of few photons or single photons is also essential for quantum communications or quantum networks. In this work, we propose a hybrid configuration composed of a quantum dot-metallic nanoparticle (QD-MNP) composite in a ring cavity to achieve ONR at the few-photon level via optical bistability. With the surface plasmon effect of the MNP, the bistable property and regime of photons producing ONR in an asymmetric ring cavity including a QD and an MNP inside can be significantly improved in comparison with the case of a single QD. By using the bistability effect, giant ONR can be achieved in an optimal window of numbers of input photons. The detuning and the coupling strength coefficients of the hybrid system can be adjusted and utilized to optimize the performance of the quantum nonreciprocity. This work may find promising applications in quantum nonreciprocal devices and photonic quantum circuits.