ArticleNanophotonics (Berlin, Germany)2024
Si metasurface supporting multiple quasi-BICs for degenerate four-wave mixing.
Article in Nanophotonics (Berlin, Germany), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Merging van der Waals Materials and Optical Metasurfaces for Cavity Quantum Electrodynamics.Nanophotonics (Berlin, Germany) · 2026Article
- Bound states in the continuum: From fundamental physics to emerging photonic paradigms.iScience · 2026Review
- Intrapulse multimodal four-wave sum mixing in the visible range from high contrast index grating with PMMA layer.Light, science & applications · 2026Article
- Robust multiresonant nonlocal metasurfaces by rational design.Nanophotonics (Berlin, Germany) · 2025Article
- New frontiers in nonlinear nanophotonics.Nanophotonics (Berlin, Germany) · 2024Article
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9 authors.
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Abstract
Dielectric metasurfaces supporting quasi-bound states in the continuum (qBICs) enable high field enhancement with narrow-linewidth resonances in the visible and near-infrared ranges. The resonance emerges when distorting the meta-atom's geometry away from a symmetry-protected BIC condition and, usually, a given design can sustain one or two of these states. In this work, we introduce a silicon-on-silica metasurface that simultaneously supports up to four qBIC resonances in the near-infrared region. This is achieved by combining multiple symmetry-breaking distortions on an elliptical cylinder array. By pumping two of these resonances, the nonlinear process of degenerate four-wave mixing is experimentally realized. By comparing the nonlinear response with that of an unpatterned silicon film, the near-field enhancement inside the nanostructured dielectric is revealed. The presented results demonstrate independent geometric control of multiple qBICs and their interaction through wave mixing processes, opening new research pathways in nanophotonics, with potential applications in information multiplexing, multi-wavelength sensing and nonlinear imaging.
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