Observation of photobleaching and intensity dependent kinetics in Ge22As22Se56 thin films under sub-bandgap light illumination
Abstract
We experimentally demonstrate photobleaching (PB) in Ge22As22Se56 thin films, when illuminated with a diode pumped solid state laser (DPSSL) of wavelength 671 nm, which is far below the optical bandgap of the sample. Interestingly, we found that PB is a slow process and occurs even at moderate pump beam intensity of 0.2 W/cm2, however the kinetics remain rather different.
- Publication:
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Materials Science and Engineering Conference Series
- Pub Date:
- February 2015
- DOI:
- 10.1088/1757-899X/73/1/012073
- Bibcode:
- 2015MS&E...73a2073K