Near-surface and interface absorption in coated substrates

Ludovic Escoubas; Pierre J. Roche; Mireille Commandre

doi:10.1117/12.246764

19 August 1996 Near-surface and interface absorption in coated substrates

Ludovic Escoubas, Pierre J. Roche, Mireille Commandre

Proceedings Volume 2775, Specification, Production, and Testing of Optical Components and Systems; (1996) https://doi.org/10.1117/12.246764
Event: Optical Instrumentation and Systems Design, 1996, Glasgow, United Kingdom

Abstract

We demonstrate that part of the absorption of coated glass substrates is due to the photoinduced absorption of the substrate during the evaporation process. This phenomenon, called solarization, results from short wavelength radiation due to the interaction between electrons emitted by the electron gun and the material to be evaporated. We develop a method of front and back illumination of samples in order to separate each part of the in-depth absorption using photothermal measurements: bulk and interface absorption of the thin film, substrate absorption. This way, we can present the balance of absorption losses in different single layer films.

Citation Download Citation

Ludovic Escoubas, Pierre J. Roche, and Mireille Commandre "Near-surface and interface absorption in coated substrates", Proc. SPIE 2775, Specification, Production, and Testing of Optical Components and Systems, (19 August 1996); https://doi.org/10.1117/12.246764

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