Photo-thermo-optical modulation of Raman scattering from Mie-resonant silicon nanostructures.

ABSTRACT: Raman scattering is sensitive to local temperature and thus offers a convenient tool for non-contact and non-destructive optical thermometry at the nanoscale. In turn, all-dielectric nanostructures, such as silicon particles, exhibit strongly enhanced photothermal heating due to Mie resonances, which leads to the strong modulation of elastic Rayleigh scattering intensity through subsequent thermo-optical effects. However, the influence of the complex photo-thermo-optical effect on inelastic Raman scattering has yet to be explored for resonant dielectric nanostructures. In this work, we experimentally demonstrate that the strong photo-thermo-optical interaction results in the nonlinear dependence of the Raman scattering signal intensity from a crystalline silicon nanoparticle via the therma

SUBMITTER: Vikram MP 

PROVIDER: S-EPMC11501727 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature