Acoustoplasmonic Metasurfaces Based on Polymer-Grafted Nanoparticles.

ABSTRACT: Nanocomposites assembled from polymer-grafted plasmonic nanoparticles (PGNs) can combine strong light-matter interactions with soft-matter functionalities and a high degree of translational symmetry. This work explored the potential of gold nanoparticles (16 nm diameter) grafted with polystyrene chains (degree of polymerization, N ≈ 63) as building blocks for acoustoplasmonic metasurfaces. We have decorated inorganic surfaces─crystalline silicon and SiO₂ glass─with PGN monolayers and explored their surface acoustic waves with micro-Brillouin Light Scattering (μ-BLS) at various photon energies. Aided by finite-element-method calculations of acoustic phonons, plasmons and optomechanics, we show that PGNs sustain coupled sphere modes with rattling, torsional, and quadrupolar

SUBMITTER: Vasileiadis T 

PROVIDER: S-EPMC12356073 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature