Plasmonic optical properties of a single gold nano-rod.
Polarization-contrast microscopy coupled with an atomic force microscope is utilized to attain far-field optical images of the multipolar surface plasmon resonance (SPR) modes of single gold nano-rod. Modulated standing modes resulted from the interference of longitudinal SPR modes and incident light are observed and studied. By counting the average distance of adjacent beats on this single gold nano-rod, the wave vector of longitudinal SPR modes can be obtained. We found a linear relationship between the wave vectors of the incident light and the induced SPR modes. Experimental results demonstrate a feasible way on acquiring plasmonic optical properties from an individual single gold nano-rod.
Huang
Hung Ji
HJ
Yu
Chin-Ping
CP
Chang
Hung Chun
HC
Chiu
Kuo Pin
KP
Ming Chen
Hao
H
Liu
Ru Shi
RS
Tsai
Din Ping
DP