STP954

    Thermal Properties of Optical Thin Film Materials

    Published: Jan 1986


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    Abstract

    The performance of coatings for high power laser application depends not only on the optical properties of the films, but the thermal properties as well. An examination of the literature indicates that virtually all work has concerned the optical absorptance or reflectance, and that virtually no thermal property data are available for optical materials as thin films. Since it is known that the optical absorptance is often larger by orders of magnitude for a material as a thin film compared to bulk, a similar change (decrease) in thermal diffusivity might be expected. Of additional concern are the interfacial thermal barriers occurring at the boundaries between films. This paper presents experimental data for thin-film materials including Al2O3 and SiO2 deposited in high vacuum. A simple theoretical analysis is also presented at well as recommendation for further work.

    Keywords:

    heat capacity, optical materials, optical properties, thermal conductivity, thin films


    Author Information:

    Decker, DL
    Michelson Laboratory, Physics Division Naval Weapons Center, China Lake, California

    Koshigoe, LG
    Michelson Laboratory, Physics Division Naval Weapons Center, China Lake, California

    Ashley, EJ
    Michelson Laboratory, Physics Division Naval Weapons Center, China Lake, California


    Paper ID: STP23130S

    Committee/Subcommittee: F01.19

    DOI: 10.1520/STP23130S


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