Title :
Interferences among optical near fields nanofocused by plasmonic probe
Author :
Tanaka, Kiyoshi ; Katayama, Kengo ; Tanaka, Mitsuru
Author_Institution :
Dept. of Electron. & Comput. Eng., Gifu Univ., Gifu, Japan
Abstract :
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.
Keywords :
light interference; method of moments; nanophotonics; nanorods; optical focusing; plasmonics; polaritons; surface plasmons; SPP nanofocusing; dark spots; disk shape; enhanced local optical fields; interference patterns; method of moments; nanorod; nanoscale dimensions; plasmon-enhanced local fields; plasmonic metal-coated conical dielectric probe; surface plasmon polaritons; toroidal shape; wave number; Dielectrics; Interference; Metals; Optical diffraction; Plasmons; Probes; Shape;
Conference_Titel :
Electromagnetic Theory (EMTS), Proceedings of 2013 URSI International Symposium on
Conference_Location :
Hiroshima
Print_ISBN :
978-1-4673-4939-0
