闭合回路相干增益原子系统中完美非互易反射光放大  

Perfect non-reciprocal reflection amplification in closed loop coherent gain atomic system

作　　者：李观荣 郑怡婷 徐琼怡 裴笑山 耿玥 严冬 杨红[1] Li Guan-Rong;Zheng Yi-Ting;Xu Qiong-Yi;Pei Xiao-Shan;Geng Yue;Yan Dong;Yang Hong(School of Physics and Electronic Engineering,Hainan Normal University,Haikou 571158,China)

机构地区：[1]海南师范大学物理与电子工程学院,海口571158

出　　处：《物理学报》2024年第12期322-329,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:12204137,12126314,12126351);海南省榕树基金(批准号:RSYH20231165828X,RSYH20231165827X);海南省院士创新平台(批准号:YSPTZX202215,YSPTZX202207)资助的课题。

摘　　要：高性能非互易光子器件能够有效地提升光量子操控、信息处理以及量子模拟的效率.放大的光信号可以增强并隔离量子系统输出的微弱信号,避免敏感量子系统受反向散射噪声等影响,是高性能光子器件的核心技术.在我们先前的工作(2023 Opt.Express 3138228)中,基于四波混频增益并利用耦合场强度随位置线性变化实现了单向反射光放大的动力学调控.本文巧妙地设计了简单的三能级闭合回路相干增益原子系统,创新性地设置耦合场强度随位置阶梯型变化来破坏极化率空间对称性实现了完美非互易反射光放大.相比之下,耦合场强度阶梯型变化在实验上更容易调节,大大地降低了实验难度.特别地,该系统引入了相位调制.通过改变相位能够切换探测光增益和吸收的频率域,对反射光放大的调节更具灵活性.High-performance non-reciprocal photonic devices can improve the efficiency of optical quantum manipulation,information processing,and quantum simulation effectively.The enhanced optical signal can simultaneously amplify the weak signal output by the quantum system and isolate the sensitive quantum system from the back-scattered external noise,which is the core technology of high-performance photonic devices.In our previous work(2023 Opt.Express 3138228),we have achieved dynamic control of unidirectional reflection amplification based on four-wave mixing gain and the use of coupling field intensity varying linearly with position.In this work,we design a simple three-level closed loop coherent gain atomic system,setting the intensity of coupling field to be varying with position step shape to break the spatial symmetry of probe susceptibility,and achieving perfect non-reciprocal reflection light amplification.In contrast,the stepped variation of coupling field intensity is easier to adjust in experiment,greatly reducing the difficulty in the experiment.Specifically,the system introduces phase modulation.By changing the phase,the frequency region of probe gain and absorption can be switched,which makes the modulation of reflection amplification more flexible.

关 键 词：完美非互易 反射光放大 相对相位 

分 类 号：O431.2[机械工程—光学工程]