Open AccessTheory and experiment of surface thermal lens technique used in absorption measurement of thin films
Author(s) -
Shuhai Fan,
Hongbo He,
Zhengxiu Fan,
Jianda Shao,
Zhao Yuan-An
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.5774
Subject(s) - materials science , thin film , optics , photothermal therapy , absorption (acoustics) , signal (programming language) , lens (geology) , sensitivity (control systems) , diffraction , linearity , thermal , surface (topology) , optoelectronics , composite material , computer science , nanotechnology , physics , electronic engineering , quantum mechanics , programming language , geometry , mathematics , meteorology , engineering
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.