Full optical characterization of single nanoparticles using quantitative phase imaging
Journal article, 2020

This paper introduces a procedure aimed to quantitatively measure the optical properties of nanoparticles, namely the complex polarizability and the extinction, scattering, and absorption cross sections, simultaneously. The method is based on the processing of intensity and wavefront images of a light beam illuminating the nanoparticle of interest. Intensity and wavefront measurements are carried out using quadriwave lateral shearing interferometry, a quantitative phase imaging technique with high spatial resolution and sensitivity. The method does not require any preknowledge on the particle and involves a single interferogram image acquisition. The full determination of the actual optical properties of nanoparticles is of particular interest in plasmonics and nanophotonics for the active search and characterization of new materials, e.g., aimed to replace noble metals in future applications of nanoplasmonics with less-lossy or refractory materials.

Author

Samira Khadir

Institut Fresnel

Daniel Andrén

Nano and Biophysics

Patrick C. Chaumet

Institut Fresnel

Serge Monneret

Institut Fresnel

Nicolas Bonod

Institut Fresnel

Mikael Käll

Nano and Biophysics

Anne Sentenac

Institut Fresnel

Guillaume Baffou

Institut Fresnel

Optica

2334-2536 (ISSN)

Vol. 7 3 243-248

Subject Categories

Accelerator Physics and Instrumentation

Atom and Molecular Physics and Optics

Other Physics Topics

DOI

10.1364/OPTICA.381729

More information

Latest update

7/1/2020 2