Power dependence of reflectivity of metallic films
- 1 January 1976
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 15 (1) , 127-131
- https://doi.org/10.1364/ao.15.000127
Abstract
The reflectivity of vacuum-deposited gold films on quartz glass substrates was studied as a function of 10.6-μm radiation power density. A simple linear model of the temperature dependence of the absorptivity of the gold film is developed. This temperature dependence is coupled with a three-dimensional heat flow analysis and fits the experimental data well. The absorptivity α is written as α0(1 + βT) and the values of α0 and β are determined, respectively, as (0.88 ± 0.01) × 10−2 and 12 × 10−4/°C.Keywords
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