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Photobleaching of sol-gel-derived germanium oxide glass thin films

Published online by Cambridge University Press:  31 January 2011

Jae Hyeok Jang ,
Junmo Koo  and
Byeong-Soo Bae
Jae Hyeok Jang
Affiliation:
Laboratory of Optical Materials and Coating (LOMC), Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon 305-701, Korea
Junmo Koo
Affiliation:
Laboratory of Optical Materials and Coating (LOMC), Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon 305-701, Korea
Byeong-Soo Bae
Affiliation:
Laboratory of Optical Materials and Coating (LOMC), Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Taejon 305-701, Korea
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Abstract

Photobleaching of the optical absorption band in the 5-eV region of sol-gel-derived germanium oxide glass thin films was examined with the irradiation of the 5-eV light. The photobleaching represented by the saturated absorption coefficient change (−Δα) and the ratio of the neutral oxygen monovacancies to neutral oxygen divacancies concentrations for the germanium oxide were 175 cm−1 and 0.113, respectively. These values are larger than those of the pure germanium oxide bulk glass as well as germanosilicate thin films. The changes in bonding configuration around Ge atom by ultraviolet illumination were analyzed using x-ray photoelectron spectroscopy.

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Articles
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Journal of Materials Research , Volume 15 , Issue 2 , February 2000 , pp. 282 - 284
Copyright
Copyright © Materials Research Society 2000

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References

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