Summary
URSI Commission B 2013 International Symposium on Electromagnetic Theory EMTS 2013
2013
Session Number:21PM2B
Session:
Number:21PM2B-02
Interferences among Optical Near Fields Nanofocused by Plasmonic Probe
Kazuo Tanaka, Kiyofumi Katayama, Masahiro Tanaka,
pp.262-265
Publication Date:2013/5/20
Online ISSN:2188-5079
DOI:10.34385/proc.30.21PM2B-02
Summary:
Interferences among enhanced local optical fields generated by a plasmonic metal-coated conical dielectric probe with a nano-rod are investigated numerically. The dark spots that are interference patterns among plasmon-enhanced local fields are investigated in detail. It is found that two kinds of interference patterns (dark spots) are created in the free space in the vicinity of the nano-rod. One is created near the rod-end and has a disk shape. The other is created around the nano-rod and has a toroidal shape. Both kinds of patterns have nanoscale dimensions, because they are generated by interference between near fields that have large wavenumbers.