Plasmonic resonance scattering from silver nanowire illuminated by tightly focused singular beam.
We investigate scattering features of tightly focused singular beams by placing a cylindrical nanowire in the vicinity of a line phase singularity. Applying an illumination wavelength corresponding to silver cylinder plasmonic resonance, we compare the scattering response with that of a perfect conductor. The rigorous modeling employs a 2D version of the Richards-Wolf focusing method and the source model technique. It is found that a cylinder with a plasmonic resonance produces a strong scattering response by deflecting the power flow toward the optical singularity region, where otherwise the power approaches zero.
Normatov
Alexander
A
Department of Electrical Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel. alexn@tx.technion.ac.il
Spektor
Boris
B
Leviatan
Yehuda
Y
Shamir
Joseph
J