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Giant photoinduced optical bleaching at room and liquid helium temperatures in Sb/As(2)S(3) multilayered films

Naik, Ramakanta and Adarsh, KV and Ganesan, R and Sangunni, KS (2011) Giant photoinduced optical bleaching at room and liquid helium temperatures in Sb/As(2)S(3) multilayered films. In: Optics Communications, 284 (22). pp. 5319-5322.

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Official URL: http://dx.doi.org/10.1016/j.optcom.2011.07.060

Abstract

We report the observation of giant photo induced optical bleaching in Sb/As(2)S(3) multilayered film at room and liquid He temperatures, when irradiated with 532 nm laser at moderate intensities. The experimental results show a dramatic increase in transmittance near the band gap regime at both the temperatures; however the rates at which transmission change occurs are rather slow at low temperature. The huge change in transmission is due to the photo induced intermixing of As(2)S(3) layer with Sb. Our XPS measurements show that photo induced intermixing occurs through the wrong homopolar bonds, which under actinic light illumination are converted into energetically favored hetropolar bonds. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Multilayered thin films;Optical properties;FTIR;XPS
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 08 Nov 2011 11:03
Last Modified: 29 Feb 2012 04:57
URI: http://eprints.iisc.ac.in/id/eprint/41927

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