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Intrinsic strong light-matter coupling with self-hybridized bound states in the continuum in van der Waals metasurfaces
Publikationstyp
Journal Article
Date Issued
2023-06-22
Sprache
English
Author(s)
Kühner, Lucca
Ben Mhenni, Amine
Wilson, Nathan P.
Kühne, Julius
Finley, Jonathan J.
Journal
Volume
22
Issue
8
Start Page
970
End Page
976
Citation
Nature Materials 22 (8): 970-976 (2023)
Publisher DOI
Scopus ID
Photonic bound states in the continuum (BICs) provide a standout platform for strong light-matter coupling with transition metal dichalcogenides (TMDCs) but have so far mostly been implemented as traditional all-dielectric metasurfaces with adjacent TMDC layers, incurring limitations related to strain, mode overlap and material integration. Here, we demonstrate intrinsic strong coupling in BIC-driven metasurfaces composed of nanostructured bulk tungsten disulfide (WS₂) and exhibiting resonances with sharp, tailored linewidths and selective enhancement of light-matter interactions. Tuning of the BIC resonances across the exciton resonance in bulk WS₂ is achieved by varying the metasurface unit cells, enabling strong coupling with an anticrossing pattern and a Rabi splitting of 116 meV. Crucially, the coupling strength itself can be controlled and is shown to be independent of material-intrinsic losses. Our self-hybridized metasurface platform can readily incorporate other TMDCs or excitonic materials to deliver fundamental insights and practical device concepts for polaritonic applications.
DDC Class
600: Technology