META 2021, META'12

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Nano-Signature of Surface Charge Spatial Distribution of Metal Nanoparticles Irradiated Off-Resonance
Xuan Zhou, Claire Deeb, Davy Gérard, Alexandre Bouhelier, Prashant K Jain, Jérôme Plain, Olivier Soppera, Lavinia Balan, Pascal Royer, Gary P Wiederrecht, Renaud Bachelot

Last modified: 2015-07-04


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.


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