# Determination of Thermal Diffusion Length in Bismuth Doped Chalcogenide Glasses, by Photoacoustic Technique

Thangaraju, B and Ganesan, R and Bhat, Asha N and Sangunni, KS and Gopal, ESR (2000) Determination of Thermal Diffusion Length in Bismuth Doped Chalcogenide Glasses, by Photoacoustic Technique. In: Journal of Optoelectronics and Advanced Materials, 2 (1). pp. 91-94.

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## Abstract

The photoacoustic (PA) technique has been used to measure the thermal diffusion length in $Ge_{20}Bi_xSe_{80-x} (2\leq x \leq 12)$ and $Ge_{20}Bi_xSe_{70-x}Te_{10} (2.5 \leq x \leq 11)$glasses. The measured thermal diffusion length values show an unusual behaviour near the p to n transition. This anomaly has been explained by the effect of the percolation threshold in these systems.

Item Type: Journal Article Publisher Copyright of this article belongs to Romania’s National Institute of Research and Development for Optoelectronics. Chalcogenide glass;n type conduction;Photoacoustic;spectroscopy. Division of Physical & Mathematical Sciences > Physics 15 Sep 2008 05:12 19 Sep 2010 04:49 http://eprints.iisc.ernet.in/id/eprint/15742