Li Mengyao, Sinev Ivan, Benimetskiy Fedor, Ivanova Tatyana, Khestanova Ekaterina, Kiriushechkina Svetlana, Vakulenko Anton, Guddala Sriram, Skolnick Maurice, Menon Vinod M, Krizhanovskii Dmitry, Alù Andrea, Samusev Anton, Khanikaev Alexander B
Department of Electrical Engineering, City College of New York, New York, NY, USA.
Physics Department, City College of New York, New York, NY, USA.
Nat Commun. 2021 Jul 20;12(1):4425. doi: 10.1038/s41467-021-24728-y.
The rise of quantum science and technologies motivates photonics research to seek new platforms with strong light-matter interactions to facilitate quantum behaviors at moderate light intensities. Topological polaritons (TPs) offer an ideal platform in this context, with unique properties stemming from resilient topological states of light strongly coupled with matter. Here we explore polaritonic metasurfaces based on 2D transition metal dichalcogenides (TMDs) as a promising platform for topological polaritonics. We show that the strong coupling between topological photonic modes of the metasurface and excitons in TMDs yields a topological polaritonic Z phase. We experimentally confirm the emergence of one-way spin-polarized edge TPs in metasurfaces integrating MoSe and WSe. Combined with the valley polarization in TMD monolayers, the proposed system enables an approach to engage the photonic angular momentum and valley and spin of excitons, offering a promising platform for photonic/solid-state interfaces for valleytronics and spintronics.
量子科学技术的兴起促使光子学研究寻找具有强光与物质相互作用的新平台，以便在中等光强下实现量子行为。在此背景下，拓扑极化激元（TPs）提供了一个理想平台，其独特性质源于与物质强耦合的光的弹性拓扑态。本文中，我们探索基于二维过渡金属二卤化物（TMDs）的极化激元超表面，作为拓扑极化激元学的一个有前景的平台。我们表明，超表面的拓扑光子模式与TMDs中的激子之间的强耦合产生了拓扑极化激元Z相。我们通过实验证实了在集成MoSe和WSe的超表面中出现了单向自旋极化边缘TPs。结合TMD单层中的谷极化，所提出的系统为利用光子角动量以及激子的谷和自旋提供了一种方法，为谷电子学和自旋电子学的光子/固态界面提供了一个有前景的平台。
