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Polarization-Controlled Exciton-Polaritons in WS2 Strongly Coupled with Low-Symmetry Photonic Crystal Nanostructures

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    Polarization-Controlled Exciton-Polaritons in WS2 Strongly Coupled with Low-Symmetry Photonic Crystal Nanostructures
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    • Yuefeng Wang
      Yuefeng Wang
      School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
      Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People’s Republic of China
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    • Di Huang
      Di Huang
      Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People’s Republic of China
      Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, Jiangsu 215123, People’s Republic of China
      More by Di Huang
    • Meng Xia
      Meng Xia
      Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People’s Republic of China
      More by Meng Xia
    • Jiaxin Zhou
      Jiaxin Zhou
      School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
      Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People’s Republic of China
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    • Yuhua Chen
      Yuhua Chen
      Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People’s Republic of China
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    • Xingwang Zhang*
      Xingwang Zhang
      School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
      Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences (CAS), Suzhou, Jiangsu 215123, People’s Republic of China
      *E-mail: [email protected]
      More by Xingwang Zhang
      Orcidhttps://orcid.org/0000-0002-5561-681X
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    Nano Letters

    Cite this: Nano Lett. 2024, 24, 37, 11551–11558
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    https://doi.org/10.1021/acs.nanolett.4c03040
    Published September 3, 2024
    Copyright © 2024 American Chemical Society
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    Abstract

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    Atomically thin transition metal dichalcogenides (TMDs) with ambient stable exciton resonances have emerged as an ideal material platform for exciton-polaritons. In particular, the strong coupling between excitons in TMDs and optical resonances in anisotropic photonic nanostructures can form exciton-polaritons with polarization selectivity, which offers a new degree of freedom for the manipulation of the light–matter interaction. In this work, we present the experimental demonstration of polarization-controlled exciton-polaritons in tungsten disulfide (WS2) strongly coupled with polarization singularities in the momentum space of low-symmetry photonic crystal (PhC) nanostructures. The utilization of polarization singularities can not only effectively modulate the polarization states of exciton-polaritons in the momentum space but also facilitate or suppress their far field coupling capabilities by tuning the in-plane momentum. Our results provide new strategies for creating polarization-selective exciton-polaritons.

    Copyright © 2024 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.nanolett.4c03040.

    • Tune the locations of V points by lattice deformation. Sample fabrication and characterization. Interaction between SiNx PhC slabs and WS2 with different thicknesses. Improve the light–matter interaction in WS2/SiNx PhC slabs with PDMS claddings. The temporal coupled-mode theory. Extended data for the p2 symmetry WS2/SiNx PhC slab. Extended data for the pm symmetry WS2/SiNx PhC slab (PDF)

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    Nano Letters

    Cite this: Nano Lett. 2024, 24, 37, 11551–11558
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.nanolett.4c03040
    Published September 3, 2024
    Copyright © 2024 American Chemical Society
    Request reuse permissions

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