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Manipulating multiple optical parametric processes in photonic topological insulators
Physical Review B ( IF 3.7 ) Pub Date : 2024-05-13 , DOI: 10.1103/physrevb.109.174110
Zhen Jiang 1, 2 , Bo Ji 1, 2 , Yanghe Chen 1, 2 , Chun Jiang 1 , Guangqiang He 1, 2
Affiliation  

Topological quantum optics has endowed integrated quantum devices with novel functionalities, including unidirectional transport and immunity to structural defects. Here we propose topological interfaces that support two distinct edge modes with different frequency ranges. The nonlinear four-wave mixing processes in the topological interfaces lead to the generation of signal and idler photons, each corresponding to distinct edge modes. By designing a diamondlike topological structure, we can couple the signal and idler photons into opposite branches, leading to spatial separation of the photon pairs. This behavior enables on-chip generation and flexible control of the topological biphoton states. More importantly, the biphoton states are inborn topologically protected, showing robustness against sharp bends and disorders. Our proposal offers the possibility of robust, multifunctional topological quantum devices, which may find applications in quantum information processing.

中文翻译:

操纵光子拓扑绝缘体中的多个光学参数过程

拓扑量子光学赋予集成量子器件新颖的功能,包括单向传输和结构缺陷免疫性。在这里,我们提出了支持两种不同频率范围的不同边缘模式的拓扑接口。拓扑界面中的非线性四波混频过程导致信号光子和闲频光子的生成,每个光子对应于不同的边缘模式。通过设计类金刚石拓扑结构,我们可以将信号光子和闲置光子耦合到相反的分支中,从而导致光子对的空间分离。这种行为使得能够在芯片上生成并灵活控制拓扑双光子状态。更重要的是,双光子态天生受到拓扑保护,表现出对急剧弯曲和紊乱的鲁棒性。我们的建议提供了强大的多功能拓扑量子器件的可能性,该器件可能在量子信息处理中得到应用。
更新日期:2024-05-13
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