基于光学非互易的双路多信道全光操控  

All-optical manipulation of two-way multi-channel based on optical nonreciprocity

作　　者：李鑫 解舒云 李林帆 周海涛[1,2] 王丹 杨保东[1,2] Li Xin;Xie Shu-Yun;Li Lin-Fan;Zhou Hai-Tao;Wang Dan;Yang Bao-Dong(School of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学物理电子工程学院,太原030006 [2]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18期162-171,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61975102,11704235);山西省自然科学基金(批准号:20210302123437);山西省青年科技研究基金(批准号:201901D211166);山西省高等学校科技创新项目(批准号:2020L0038)资助的课题。

摘　　要：基于原子热运动的极化率-动量锁定特性及腔引起的强耦合特征,设计并实现了一套无磁的光学互易-非互易传输转换方案.理论和实验证实,耦合场条件决定了系统的非互易性.在单束行波场作用下,由于多普勒效应,热原子中的非互易性取决于耦合场的传播方向.因此,通过改变对向耦合场的开闭,可控制基于内腔电磁诱导透明的双路单信道光学非互易传输.而在两束对向耦合场同时作用下,腔透射由单暗态转变为双暗态极子峰,其互易性输出依赖于两束耦合场之间的频率差.于是通过调谐频率差可实现基于双暗态极子峰的双路多信道互易-非互易传输调控.Owing to the potential applications in all-optical quantum information processing and quantum optical networks,magnet-free optical non-reciprocity transmission has attracted great interest and has been studied in many fields,such as parity-time-symmetry enhanced nonlinearity,optomechanical systems,photonic crystal,cold atomic Bragg lattices,chiral quantum optics,and hot atoms.In particular,the random thermal motion of hot atoms can be a useful resource to realize optical non-reciprocity.Here in this work,based on the susceptibility-momentum-locking of atomic thermal motion and the strong coupling characteristics of cavities,a magnetic-free optical reciprocity-nonreciprocity transmission conversion scheme is designed and realized through the atom-cavity compound system.Theoretical and experimental analysis show that the coupling field conditions determine the nonreciprocity of the system.Under the action of single traveling-wave field,the nonreciprocity in hot atoms depends on the propagation direction of the coupling field due to the Doppler effect.Therefore,by changing the opening and closing of the opposite coupling field,the two-way single channel optical nonreciprocal transmission based on intracavity electromagnetically induced transparency can be controlled.When the two coupling fields propagate simultaneously in the opposite directions,however,the cavity transmission changes from single-dark-state to double-dark-state peaks,in which the reciprocity outputs depend on the frequency difference between the two coupling fields.By tuning the frequency difference,the twoway multi-channel reciprocal-nonreciprocal transmission regulation based on double dark polar peaks can be realized.The study can be applied to all-optical quantum devices and quantum information processing,such as optical transistors,optical switching and routing,and quantum gate manipulation.

关 键 词：光学非互易 双暗态 多普勒频移 全光开关 

分 类 号：O431.2[机械工程—光学工程]