ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

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.

[img] PDF
Opt_Let_38-10_1682_2013.pdf - Published Version
Restricted to Registered users only

Download (333kB) | Request a copy
Official URL: http://dx.doi.org/10.1364/OL.38.001682


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

Actions (login required)

View Item View Item