Real-time tuning of plasmonic nanogap cavity resonances through solvent environments.

ABSTRACT: Nanogap cavity metasurfaces - an array of metallic nanoparticles separated from a metal plane by a nanometer-scale dielectric material - can manipulate electromagnetic waves across a wide wavelength range. Through this, they can profoundly modify the optical processes of molecules and materials relevant to quantum communications, photocatalysis, and optoelectronics. Interactions between nanocavities and light, however, require overlap between the cavity resonance and the energy of the incident photon or optical transition, demanding labor-intensive fabrication of bespoke metasurfaces for each desired application. Here, we dynamically tune the resonance wavelength of nanogap cavity metasurfaces by modulating the refractive index of the surrounding medium using solvents. We achieve precise,

SUBMITTER: Shin E 

PROVIDER: S-EPMC12617722 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature