Study on the photothermal characteristics of the two layers of uniaxial materials irradiated by continuously modulated laser

Changchun Yan; Guogang Xue; Cheng Liu; Hao Chen

doi:10.1117/12.575591

10 January 2005 Study on the photothermal characteristics of the two layers of uniaxial materials irradiated by continuously modulated laser

Changchun Yan, Guogang Xue, Cheng Liu, Hao Chen

Author Affiliations +

Proceedings Volume 5640, Infrared Components and Their Applications; (2005) https://doi.org/10.1117/12.575591
Event: Photonics Asia, 2004, Beijing, China

Abstract

According to heat conduction equations and especial boundary conditions, the photothermal emission distribution of two-layer thermally uniaxial thin films has been acquired in the cylindrical coordinate system by Hankel transformation and retransformation. Applying specific parameters to two-layer thermally uniaxial thin films, the ones are discussed. The larger are the ratios of longitudinal heat conductions and transverse ones of the thin films with high thermal diffusivity, the larger are the phase changes of the photothermal signals in the thin films. Neverthless, for the thin film with low thermal diffusion, the different ratios of longitudinal heat conductions and transverse ones are potty influences on photothermal signals. And, the smaller are optical absorption coefficients, the more evident are the influences on phases because of frequency changes.

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Changchun Yan, Guogang Xue, Cheng Liu, and Hao Chen "Study on the photothermal characteristics of the two layers of uniaxial materials irradiated by continuously modulated laser", Proc. SPIE 5640, Infrared Components and Their Applications, (10 January 2005); https://doi.org/10.1117/12.575591

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