Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Thermal conductance of laterally-wet-oxidised GaAs/AlxOy Bragg reflectors

Le Du, M. and Massoubre, David and Harmand, J.C. and Oudar, J.L. (2006) Thermal conductance of laterally-wet-oxidised GaAs/AlxOy Bragg reflectors. Electronics Letters, 42 (18). pp. 1060-1062. ISSN 0013-5194

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Thermal resistivity measurements were carried out on GaAs-based monolithic saturable absorber microcavities. Two-types of microcavity mirrors were compared: GaAs/AlAs against GaAs/AlxOy Bragg reflectors processed by lateral-wet-oxidation of Al(Ga)As layers. It is found that GaAs/AlxOy mirrors are not efficient heat dissipators, the GaAs/AlxOy microcavity structure showing a thermal resistivity more than ten times higher than the GaAs/AlAs structure. Using modelling to fit the experimental data, thermal conductivity of the 250 nm AlxOy layers is estimated to be approximately 0.007 WK–1cm–1. These results illustrate a significant drawback related to the use of thick wet-oxidised Al(Ga)As/GaAs layers