Photo-induced voltage in nano-porous gold thin film
Marjan Akbari, Masaru Onoda, Teruya Ishihara
TL;DR
This study investigates how nano-porous gold thin films generate photo-induced voltage under nanosecond laser illumination, revealing polarization and wavelength-dependent voltage behaviors explained by symmetry considerations.
Contribution
It provides the first detailed experimental analysis of photo-induced voltage in nano-porous gold films under different polarization and wavelength conditions.
Findings
Negative voltage for s-polarized light at positive incident angles
Positive voltage for p-polarized light at wavelengths >510 nm
Voltage polarity depends on polarization, wavelength, and symmetry considerations
Abstract
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.
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