Direct Writing of Nanostructured Metasurfaces by Hot-Electron-Driven Laser Sintering.

ABSTRACT: The precise fabrication of nanoscale metallic structures is pivotal to enabling progress in plasmonics, nanophotonics, and nanoelectronics. In this work, we introduce a high-resolution laser-sintering strategy for facile direct writing of plasmonic metasurfaces, avoiding the need for photolithography or ultrafast laser processing. This method exploits thermally assisted hot-electron-driven desorption and diffusion of aliphatic ligands to facilitate highly localized laser sintering of metal nanocrystals with subdiffraction-limited resolution down to ∼λ/5. A range of functional metasurface nanostructures are demonstrated. A finite-temperature quantum-mechanical model is proposed to predict the superlinear dependence of the ligand desorption rate on laser fluence. This hot-electron-driven sin

SUBMITTER: Chang K 

PROVIDER: S-EPMC12532292 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature