  We report an experimental study of generation of photo-induced voltage in
nano-porous gold (NPG) thin film under the radiation of obliquely incident
nanosecond laser light in visible regions. For s- polarized light, negative
voltage is observed along the incident plane for positive incident angles,
while for p- polarized light, positive voltage is observed for wavelength
longer than 510 nm, while it turns to negative for shorter wavelengths. The
transverse voltage for various polarized light is explained in terms of
symmetry of configuration and that of microscopically random but
macroscopically isotropic NPG.
