Full optical characterization of single nanoparticles using quantitative phase imaging

• DOI: 10.1364/optica.381729
• Publication Date: 2020-01-21T15:00:15Z
• Authors: Samira Khadir; Daniel Andrén; Patrick C. Chaumet; Serge Monneret; Nicolas Bonod; Mikael Käll; Anne Sentenac; Guillaume Baffou
• Keywords: Characterization; Nanophotonics; Collimated light

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