Anisotropic surface plasmon excitation in Au/silica nanowire
Journal
Applied Physics Letters
Journal Volume
96
Journal Issue
26
Date Issued
2010
Author(s)
Wu C.-T.
Chu M.-W.
Wang S.-B.
Hu M.-S.
Chen K.-H.
Chen L.-C.
Chen C.-W.
Abstract
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.
SDGs
Type
journal article