Cavity Quantum Electrodynamics with Second‐Order Topological Corner State,Laser & Photonics Reviews

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Cavity Quantum Electrodynamics with Second‐Order Topological Corner State
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-06-15 , DOI: 10.1002/lpor.201900425
Xin Xie _{1,

2} , Weixuan Zhang _{3,

4} , Xiaowu He ₅ , Shiyao Wu _{1,

2} , Jianchen Dang _{1,

2} , Kai Peng _{1,

2} , Feilong Song _{1,

2} , Longlong Yang _{1,

2} , Haiqiao Ni ₅ , Zhichuan Niu ₅ , Can Wang _{1,

2,

6} , Kuijuan Jin _{1,

2,

6} , Xiangdong Zhang _{3,

4} , Xiulai Xu _{1,

2,

6}

Affiliation

Topological photonics provides a new paradigm in studying cavity quantum electrodynamics with robustness to disorder. In this work, the coupling between single quantum dots and the second‐order topological corner state are demonstrated. Based on the second‐order topological corner state, a topological photonic crystal cavity is designed and fabricated into GaAs slabs with quantum dots embedded. The coexistence of corner state and edge state with high quality factor close to 2000 is observed. The enhancement of photoluminescence intensity and emission rate are both observed when the quantum dot is on resonance with the corner state. This result enables the application of topology into cavity quantum electrodynamics, offering an approach to topological devices for quantum information processing.

中文翻译：

具有二阶拓扑角状态的腔量子电动力学

拓扑光子学为研究具有无序鲁棒性的腔量子电动力学提供了新的范例。在这项工作中，展示了单个量子点与二阶拓扑角状态之间的耦合。基于二阶拓扑拐角状态，设计了一种拓扑光子晶体腔，并嵌入了嵌入量子点的GaAs平板中。观察到拐角状态和边缘状态的共存，其品质因数接近2000。当量子点与拐角状态共振时，均观察到光致发光强度和发射率的增强。该结果使拓扑能够应用于腔量子电动力学，从而为用于量子信息处理的拓扑设备提供了一种方法。

更新日期：2020-06-15

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