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Applied Physics Letters / Volume 96 / Issue 26 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 263106 (2010); http://dx.doi.org/10.1063/1.3456529 (3 pages)

Anisotropic surface plasmon excitation in Au/silica nanowire

Chien-Ting Wu1, Ming-Wen Chu2, Sheng-Bo Wang3, Ming-Shien Hu4, Kuei-Hsien Chen4, Li-Chyong Chen2, Chun-Wei Chen1, and Cheng-Hsuan Chen2,4,5

1Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan
2Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan
3Department of Electrical Engineering, Institute of Microelectronics, National Cheng Kung University, Tainan 701, Taiwan
4Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan
5Department of Physics, National Taiwan University, Taipei 106, Taiwan

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(Received 4 March 2010; accepted 31 May 2010; published online 29 June 2010)

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.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

electron energy loss spectra, excitons, gold, nanowires, photoconductivity, scanning electron microscopy, silicon compounds, surface plasmon resonance, transmission electron microscopy

PACS

  • 73.22.Lp

    Collective excitations

  • 71.35.-y

    Excitons and related phenomena

  • 79.20.Uv

    Electron energy loss spectroscopy

  • 72.40.+w

    Photoconduction and photovoltaic effects

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3456529

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    P. E. Batson, Phys. Rev. Lett. 49, 936 (1982).

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    C. H. Chen, J. Silcox, and R. Vincent, Phys. Rev. B 12, 64 (1975).

    D. Ugarte, C. Colliex, and P. Trebbia, Phys. Rev. B 45, 4332 (1992).


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