Plasmon resonant cavities in vertical nanowire arrays.
We investigate tunable plasmon resonant cavity arrays in paired parallel nanowire waveguides. Resonances are observed when the waveguide length is an odd multiple of quarter plasmon wavelengths, consistent with boundary conditions of node and antinode at the ends. Two nanowire waveguides satisfy the dispersion relation of a planar metal-dielectric-metal waveguide of equivalent width equal to the square field average weighted gap. Confinement factors over 10(3) are possible due to plasmon focusing in the interwire space.
Bora
Mihail
M
Lawrence Livermore National Laboratory, Livermore, CA, USA.
Fasenfest
Benjamin J
BJ
Behymer
Elaine M
EM
Chang
Allan S-P
AS
Nguyen
Hoang T
HT
Britten
Jerald A
JA
Larson
Cindy C
CC
Chan
James W
JW
Miles
Robin R
RR
Bond
Tiziana C
TC