Anisotropic surface plasmon excitation in Au/silica nanowire

The surface plasmon (SP) excitations of gold/silica nanowire, investigated by electron energy-loss spectroscopy in conjunction with scanning transmission electron microscopy, are found to be anisotropic with stronger SP intensities observed along the transverse direction of the nanowire. This indica...

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Bibliographic Details
Published in:Applied physics letters 2010-06, Vol.96 (26), p.263106-263106-3
Main Authors: Wu, Chien-Ting, Chu, Ming-Wen, Wang, Sheng-Bo, Hu, Ming-Shien, Chen, Kuei-Hsien, Chen, Li-Chyong, Chen, Chun-Wei, Chen, Cheng-Hsuan
Format: Article
Language:English
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Summary:The surface plasmon (SP) excitations of gold/silica nanowire, investigated by electron energy-loss spectroscopy in conjunction with scanning transmission electron microscopy, are found to be anisotropic with stronger SP intensities observed along the transverse direction of the nanowire. This indicates that the charge carriers generated near the surface of the nanowires by the decay of SP resonance play a significant role to the enhanced photoconductivity. This conclusion is reaffirmed by the polarization dependent photoconductivity measurement.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3456529