Intrinsic strong light-matter coupling with self-hybridized bound states in the continuum in van der Waals metasurfaces

Abstract 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 (WS 2 ) 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 WS 2 is achieved by varying the metasurface unit…

• AV
  Alexander von Humboldt-Stiftung
• ST
  Solar Technologies go Hybrid
• IM
  International Max Planck Research School for Environmental, Cellular and Molecular Microbiology
• DF
  Deutsche Forschungsgemeinschaft

  Awards: 390776260, EXC-2111-390814868, EXC-2111, EXC 2089/1 – 390776260, EXC-2111—390814868, EXC 2089/1, TI 1063/1, EXC 2089/1-390776260, EXC 2089, 2089/1-390776260, 390814868
• IM
  International Max Planck Research School for Advanced Methods in Process and Systems Engineering
• IM
  International Max Planck Research School for Quantum Science and Technology
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/W017075/1, EP/W017075/1