&lt;title&gt;Thermal diffusivity of thin films and surfaces investigated by transient thermal gratings&lt;/title&gt;

Wu, Zhouling; Jauregui, J.; Schaefer, Dieter; Matthias, E.

doi:10.1117/12.60113

Cited by 3 publications

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“…These techniques are applied e.g. for absorption characterization of substrates and thin films [6,7], investigations of thermal properties of thin films {3, 8,9], defect characterization and damage studies [10,11] and more.…”

Section: Introductionmentioning

confidence: 99%

<title>Determination of the thermal conductivity of optical coatings using photothermal deflection technique and finite-element calculations</title>

Krupka¹,

Giesen²

1996

SPIE Proceedings

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Photothermal deflection measurements on optical components for 10.6 ,um are presented. This technique is used to measure the photo induced deformation of the coated surface. The experimental results are compared to finite element calculations which allows the determination of the temperature and deformation profile at every point on the surface and within the sample. This comparison allows the determination of the thermal conductivity of the coatings.Although in the finite element calculations the coatings are approximated as only one single layer, we find a good agreement with the experimental results.The thermal conductivity of typical coated copper mirrors for 10.6 m is found to be up to an order of magnitude lower than those of the corresponding bulk material.

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