Topological photonic interfaces support topologically nontrivial optical modes with helical character. When combined with an embedded quantum emitter that has a circularly polarized transition dipole moment, a chiral quantum optical interface is formed due to spin-momentum locking. Here, we experimentally realize such an interface by integrating semiconductor quantum dots into a valley-Hall topological photonic crystal waveguide. We harness the robust waveguide transport to create a ring resonator that supports helical modes. Chiral coupling of quantum dot transitions, with directional contrast as high as 75%, is demonstrated. The interface also supports a topologically trivial mode, comparison with which allows us to clearly demonstrate the protection afforded by topology to the nontrivial mode.

中文翻译：

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具有嵌入式量子发射器的手性拓扑光子学

拓扑光子接口支持具有螺旋特性的拓扑非平凡光学模式。当与具有圆极化跃迁偶极矩的嵌入式量子发射器组合时，由于自旋动量锁定，形成了手性量子光学界面。在这里，我们通过将半导体量子点集成到Valley-Hall拓扑光子晶体波导中来实验性地实现这种界面。我们利用强大的波导传输来创建支持螺旋模式的环形谐振器。量子点跃迁的手征耦合，具有高达75％的方向对比。该接口还支持拓扑无关紧要的模式，通过与之进行比较，我们可以清楚地说明拓扑结构对非琐碎模式所提供的保护。