Experimental observation of topological Z2 exciton-polaritons in transition metal dichalcogenide monolayers

Mengyao Li, Ivan Sinev, Fedor Benimetskiy, Tatyana Ivanova, Ekaterina Khestanova, Svetlana Kiriushechkina, Anton Vakulenko, Sriram Guddala, Maurice Skolnick, Vinod M. Menon, Dmitry Krizhanovskii, Andrea Alù, Anton Samusev and Alexander B. Khanikaev ()
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Mengyao Li: City College of New York
Ivan Sinev: ITMO University
Fedor Benimetskiy: ITMO University
Tatyana Ivanova: ITMO University
Ekaterina Khestanova: ITMO University
Svetlana Kiriushechkina: City College of New York
Anton Vakulenko: City College of New York
Sriram Guddala: City College of New York
Maurice Skolnick: ITMO University
Vinod M. Menon: City College of New York
Dmitry Krizhanovskii: ITMO University
Andrea Alù: City College of New York
Anton Samusev: ITMO University
Alexander B. Khanikaev: City College of New York

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract 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 Z2 phase. We experimentally confirm the emergence of one-way spin-polarized edge TPs in metasurfaces integrating MoSe2 and WSe2. 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.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24728-y

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DOI: 10.1038/s41467-021-24728-y

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