Polarized Nonlinear Nanoscopy of Metal Nanostructures
Journal article, 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.

Optics

gold nanoparticles

metal

Materials Science

optical-properties

particles

polariiation

plasmonics

interference

2nd-harmonic generation microscopy

light

Physics

Science & Technology - Other Topics

modes

oligomers

second harmonic generation

scattering

nonlinear microscopy

resonances

Author

N. K. Balla

Institut Fresnel

C. Rendon-Barraza

Institut Fresnel

L. M. Hoang

University of Georgia

Institut Fresnel

Pawel Karpinski

Chalmers, Physics, Bionanophotonics

E. Bermudez-Urena

Barcelona Institute of Science and Technology (BIST)

S. Brasselet

Institut Fresnel

ACS Photonics

2330-4022 (eISSN)

Vol. 4 2 292-301

Driving Forces

Sustainable development

Subject Categories

Atom and Molecular Physics and Optics

DOI

10.1021/acsphotonics.6b00635

More information

Latest update

9/6/2018 1