Bouteyre, P. orcid.org/0000-0001-8246-8448, Hu, X., Randerson, S.A. et al. (3 more authors) (2025) Simultaneous observation of bright and dark polariton states in subwavelength gratings made from quasi-bulk WS2. Optics Express, 33 (10). 21173. ISSN 1094-4087
Abstract
Over the last decade, layered crystals, referred to as van der Waals (vdW) materials, have attracted tremendous interest due to their unique properties in their single and few layer forms. Their bulk counterparts, however, have only been recently explored as building blocks for nanophotonics. Indeed, bulk vdW materials offer promising properties such as high refractive indices and adherence to any type of substrate. We present here a variety of 1D grating structures composed of bulk transition metal dichalcogenide (TMD) WS2 as a highly tunable and versatile platform for observation of a multi-level polaritonic system. The WS2 excitons are simultaneously strongly coupled with the two grating photonic modes, including the bound state in the continuum (BIC) of the lower energy mode, giving rise to polariton-BICs. The polaritonic dispersion shapes can be varied in a straightforward fashion by choosing WS2 films of different thicknesses and changing the gratings periods.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
Keywords: | Quantum Physics; Physical Sciences |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/S030751/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/V007696/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/V006975/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/V047663/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/V026496/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 22 May 2025 15:14 |
Last Modified: | 22 May 2025 15:14 |
Status: | Published |
Publisher: | Optica Publishing Group |
Refereed: | Yes |
Identification Number: | 10.1364/oe.553437 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:227031 |