Journal
OPTICS EXPRESS
Volume 15, Issue 12, Pages 7132-7139Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.15.007132
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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.(c) 2007 Optical Society of America.
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