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Crystallization Studies of Glassy Te-Se-Br Thin Films

Published online by Cambridge University Press:  21 February 2011

J. L. Adam ,
C. Ortiz ,
J. R. Salem  and
X. H. Zhang
J. L. Adam
Affiliation:
IBM Research division, Almaden Research Center, 650 Harry Road, SAN JOSE, CA 95120-6099, U.S.A.
C. Ortiz
Affiliation:
IBM Research division, Almaden Research Center, 650 Harry Road, SAN JOSE, CA 95120-6099, U.S.A.
J. R. Salem
Affiliation:
IBM Research division, Almaden Research Center, 650 Harry Road, SAN JOSE, CA 95120-6099, U.S.A.
X. H. Zhang
Affiliation:
Laboratoire de Chimie Minérale D, Unité associée au C.N.R.S. No. 254, Université de Rennes I, Avenue du Général Leclere, 35042 RENNES-Cedex, FRANCE
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Abstract

We have studied the effect of laser irradiation on Te-Se-Br thin films. The major effects were found to be dominated by changes in composition because of the complete loss of Br and variable loss of Se. These losses are measured by EIDS and are reasonable in view of the temperatures obtained from a heat flow calculation. The remaining Te-Se material can be made crystalline under specific conditions of laser pulse length and laser power (which determine the cooling rate). We have been able to establish that the crystallization starts with surface filamentary growth exhibiting fractal network formation. With higher laser energy it tends to coalesce to form three dimensional crystals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 172: Symposium P – Optical Fiber Materials and Processing , 1989 , 221
Copyright
Copyright © Materials Research Society 1990

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