Polarized Nonlinear Nanoscopy of Metal Nanostructures
Artikel i vetenskaplig tidskrift, 2017

Nonlinear signals from metal nanostructures are known to be highly polarization-dependent, due to the intrinsic vectorial nature of nonlinear optical coupling. Nonlinear optical polarization responses contain important information on the near-field properties of nanostructures;, however, they remain complex to monitor and to model at the nanoscale. Polarization resolved nonlinear optical microscopy can potentially address this question; however, the recorded signals are generally averaged over the diffraction-limited size of a few hundreds of nanometers, thus, missing the spatial specificity of the nanostructure's optical response. Here we present a form of polarization resolved microscopy, named polarization nonlinear nanoscopy, which reveals subdiffraction scale vectorial variations of electromagnetic fields, even though the intensity image is diffraction-limited. We show that by exploiting, at a single subdiffraction pixel level, the information gained by the polarization-induced modulation, it is possible to spatially map the vectorial nature of plasmonic nonlinear optical interactions in nanostructures, revealing in particular surface contributions, retardation effects, and anisotropic spatial confinements.

metal

Optics

resonances

Science & Technology - Other Topics

light

optical-properties

plasmonics

nonlinear microscopy

2nd-harmonic generation microscopy

Physics

second harmonic generation

scattering

polariiation

interference

modes

Materials Science

particles

oligomers

gold nanoparticles

Författare

N. K. Balla

Institut Fresnel

C. Rendon-Barraza

Institut Fresnel

L. M. Hoang

The University of Georgia

Institut Fresnel

Pawel Karpinski

Chalmers, Fysik, Bionanofotonik

E. Bermudez-Urena

Barcelona Institute of Science and Technology (BIST)

S. Brasselet

Institut Fresnel

ACS Photonics

2330-4022 (eISSN)

Vol. 4 2 292-301

Drivkrafter

Hållbar utveckling

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1021/acsphotonics.6b00635