Deep-UV Silicon Polaritonic Metasurfaces for Enhanced Spectroscopy
All-dielectric silicon metasurfaces whose deep-ultraviolet resonances come from polaritonic modes driven by interband electronic transitions, rather than the conventional Mie-type modes. Arranged as a Kerker-type void metasurface that localizes strong near fields at the surface, they enhance double-resonance Raman scattering of 2D semiconductor monolayers and biomolecule autofluorescence while resisting the oxidation and photodamage that limit metal-based deep-UV sensors.
2501.00764
Deep-ultraviolet (200-300 nm) spectroscopy is highly sensitive to biomolecules and materials, but the nanostructures used to boost its signals (typically aluminium plasmonics) oxidize, degrade under …