Related Experiment Video
Updated: May 29, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
Near-field coupling of metal nanoparticles under tightly focused illumination
1Rudjer Boskovic Institute, Zagreb, Croatia. jsancho@irb.hr
Abstract:
The influence of strongly focused radiation on the electromagnetic interaction of metal particles is studied. The near-field distribution of silver dimers is calculated by combining a multiple scattering approach and the multipolar expansion of focused beams based on the Richards-Wolf description of diffracting systems. The results show that tight focusing can induce larger maximum field enhancement and stronger localization of the near field than can plane wave illumination. Additional plasmonic resonances can be obtained due to the presence of different polarization contributions at focus.

