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 (https://doi.org/10.1049/el:20062192)

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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

  • Item type:Article
    ID code:38064
    Dates:
    Date
    Event
    1 August 2006
    Published
    Keywords:thermal conductance, Bragg reflectors, thermal conductivity , thermal resistivity measurements, GaAs-based absorber microcavities, microcavity mirrors, monolithic absorber microcavities, lateral-wet-oxidation , saturable absorber microcavities , Optics. Light, Electrical and Electronic Engineering
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:01 Mar 2012 14:37
    Last modified:18 Mar 2023 03:49
    URI:https://strathprints.strath.ac.uk/id/eprint/38064
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