Imaging elliptically polarized infrared near-fields on nanoparticles by strong-field dissociation of functional surface groups.

ABSTRACT:

Abstract

We investigate the strong-field ion emission from the surface of isolated silica nanoparticles aerosolized from an alcoholic solution, and demonstrate the applicability of the recently reported near-field imaging at 720 nm [Rupp et al., Nat. Comm., 10(1):4655, 2019] to longer wavelength (2  μ m) and polarizations with arbitrary ellipticity. Based on the experimental observations, we discuss the validity of a previously introduced semi-classical model, which is based on near-field driven charge generation by a Monte-Carlo approach and classical propagation. We furthermore clarify the role of the solvent in the surface composition of the nanoparticles in the interaction region. We find that upon injection of the nanoparticles into the vacuum, the alcoholic solvent evaporates

SUBMITTER: Rosenberger P 

PROVIDER: S-EPMC9236975 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature