Photoinduced phenomena in thin films of chalcogenide system Ga-Ge-S: a role of oxidation
✍ Scribed by A. V. Povolotskiy; E. N. Borisov; T. Yu. Ivanova; A. A. Manshina
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 150 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1612-2011
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✦ Synopsis
Thin films of the chalcogenide glassy system
15(Ga~2~S~3~) - 85(GeS~2~) were deposited by ultra violet (UV)
laser ablation method. Optical absorption edge and refractive
index of the films were studied. It was found that optical
properties of the as-deposited (fresh deposited) films exhibit
modification with time (ageing phenomenon). Photoinduced changes
of the optical properties of the films were studied after films
exposure to sub-bandgap, and independently super-bandgap
monochromatic radiation. Considerable change of the optical
parameters of the films - photobleaching (blue shift of the
optical absorption edge position) and decreasing of the refractive
index as a result of laser illumination was found in both cases.
The reason of photobleaching and ageing phenomena is supposed to
be the same. These phenomena can be associated with the films
oxidation.