里德伯原子中非厄米电磁诱导光栅引起的弱光孤子偏折及其操控  

Deflection and manipulation of weak optical solitons by non-Hermitian electromagnetically induced gratings in Rydberg atoms

作　　者：高洁 杭超[1,2,3] Gao Jie;Hang Chao(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China;NYU-ECNU Institute of Physics,New York University at Shanghai,Shanghai 200122,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]华东师范大学,精密光谱科学与技术国家重点实验室,上海200241 [2]纽约大学-华东师范大学联合物理研究所,上海200122 [3]山西大学,极端光学协同创新中心,太原030006

出　　处：《物理学报》2022年第13期122-133,共12页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11974117);国家自然科学基金重点项目(批准号:2017YFA0304201)资助的课题。

摘　　要：基于里德伯-电磁感应透明系统实现了具有宇称-时间对称的电磁感应诱导光栅,并研究了系统中探测光场在到达光栅前形成孤子的过程以及经过光栅时引起的偏折现象.发现由于里德伯-电磁感应透明系统具有很强的非线性光学效应,因此只需要很少的输入探测光能量就能形成稳定的光孤子.此外还发现,通过改变电磁感应诱导光栅的增益/损耗系数、光栅周期、以及体系的克尔非线性非局域度都可以有效地改变探测光孤子的偏折程度和状态,实现对弱光孤子偏折的主动操控.本文的研究结果可为未来利用宇称-时间对称的电磁感应诱导光栅实现全光控制和光信息处理等相关应用提供一定的理论依据.Based on a Rydberg-electromagnetically-induced-transparency(Rydberg-EIT)system,an electromagnetically induced grating(EIG)with parity-time(PT)symmetry is realized.The formation of solitons before the probe laser field reaching the EIG as well as its deflection when passing through the EIG are both investigated.It is found that due to the enhanced nonlinear optical effect of the Rydberg-EIT system,stable optical soliton can be formed with a very weak input light energy.In addition,it is found that by changing the gain/absorption coefficient of EIG,the period of EIG,and the nonlocality degree of optical Kerr nonlinear of the system,the deflection degree of the optical soliton can be effectively changed and manipulated.The research results of this work can provide a theoretical basis for the future applications of PT-symmetric EIG and may be useful in the fields of all-optical manipulation and optical information processing.

关 键 词：里德伯原子 宇称-时间对称 光孤子 光偏折 

分 类 号：O413.1[理学—理论物理]