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Theory and experiment of surface thermal lens technique used in absorption measurement of thin films

He Hong-Bo Fan Zheng-Xiu Shao Jian-Da Fan Shu-Hai Zhao Yuan-An

Theory and experiment of surface thermal lens technique used in absorption measurement of thin films

He Hong-Bo, Fan Zheng-Xiu, Shao Jian-Da, Fan Shu-Hai, Zhao Yuan-An
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  • Received Date:  24 March 2005
  • Accepted Date:  05 July 2005
  • Published Online:  20 December 2005

Theory and experiment of surface thermal lens technique used in absorption measurement of thin films

  • 1. (1)中国科学院上海光学精密机械研究所,上海 201800; (2)中国科学院上海光学精密机械研究所,上海 201800;中国科学院研究生院,北京 100039

Abstract: The expression of surface thermal lens(STL) signal is deduced from photothermal deformation theory of thin film surface and STL diffraction theory. The linearity of STL signal to absorption of thin film can be seen from the expression. A measurement apparatus for thin film absorption based on STL technique is constructed. The measuring results prove that the sensitivity and accuracy of this instrument reach 10-6 magnitude.

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