Crossover from photodarkening to photobleaching in a-GexSe100-x thin films

Kumar, Rakesh Ranjan and Barik, AR and Vinod, EM and Bapna, Mukund and Sangunni, KS and Adarsh, KV (2013) Crossover from photodarkening to photobleaching in a-GexSe100-x thin films. In: Optics Letters, 38 (10). pp. 1682-1684.

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Abstract

In this Letter, we present the interesting results of photodarkening (PD), transition toward photostability, and a slow crossover from PD to photobleaching when composition of the chalcogenide glassy thin film changes from Ge-deficient to rich. A subsequent Raman analysis on these as-prepared and irradiated samples provide the direct evidence of photoinduced structural rearrangement, i.e., photocrystallization of Se and the removal of edge-sharing GeSe4 tetrahedra. Further, our experimental results clearly demonstrate that light-induced effects can be effectively controlled by choosing the right composition and provide valuable information on synthesizing photostable/sensitive glasses.

Item Type:	Journal Article
Publication:	Optics Letters
Publisher:	Optical Society of America
Additional Information:	Copyright of this article belongs to Optical Society of America.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	11 Jul 2013 06:26
Last Modified:	11 Jul 2013 06:26
URI:	http://eprints.iisc.ac.in/id/eprint/46820

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