Nano-Signature of Surface Charge Spatial Distribution of Metal Nanoparticles Irradiated Off-Resonance

Xuan Zhou; Claire Deeb; Davy GÃ©rard; Alexandre Bouhelier; Prashant K Jain; JÃ©rÃ´me Plain; Olivier Soppera; Lavinia Balan; Pascal Royer; Gary P Wiederrecht; Renaud Bachelot

META 2021, META'12

Xuan Zhou, Claire Deeb, Davy GÃ©rard, Alexandre Bouhelier, Prashant K Jain, JÃ©rÃ´me Plain, Olivier Soppera, Lavinia Balan, Pascal Royer, Gary P Wiederrecht, Renaud Bachelot

Last modified: 2015-07-04

Abstract

We report on the imaging of localized electric field on a metal/dielectric interface of gold nanoparticles out of their plasmon resonance. The surface polarization charges caused by the discontinuity of the electric field at emtal/dielectric surface provide a tiny local field enhancement. At some precise positions on the surface of nanoparticles, the resulting effective local field intensity becomes high enough to overcome the threshold dose of a photo-sensitive formulation, and hence the polymerization process is initiated. We finally end up with a cross-linked 3D polymer structure that is actually molding the spatial distribution of the surface charges held on the metal/dielectric interface.

Keywords

near-field imaging; photo-polymerization; off-resonance excitation; gold nanoparticles