Li Shu-hong, He Hong-bo, Ling Xiu-lan, Tao Chun-xian, Zhao Yuan-an, Fan Zheng-xiu
Key Laboratory of High Power Laser Materials, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Appl Opt. 2009 Oct 1;48(28):5380-5. doi: 10.1364/AO.48.005380.
A method is presented to evaluate optical absorption at a random wavelength by calculating temperature distribution in single-layer TiO(2) films. Temperature distribution in single-layer TiO(2) films was analyzed based on temperature field theory. Through our calculations, optical absorption variation was obtained to be similar to that of surface temperature rise in films. The surface temperature rise depends on film thickness, refractive index, extinction coefficient, specific heat, and thermal conductivity. Furthermore, the optical absorptions of the same single-layer TiO(2) film at different wavelengths were deduced. As an example, the surface temperature rises were calculated for the 19 single-layer TiO(2) films, which had been prepared by 12 different laboratories for the annual meeting of the Optical Society of America in 1986. The results agree well with the measured optical absorptions.
提出了一种通过计算单层TiO₂薄膜中的温度分布来评估随机波长下光吸收的方法。基于温度场理论分析了单层TiO₂薄膜中的温度分布。通过我们的计算，得出光吸收变化与薄膜表面温度升高的变化相似。表面温度升高取决于薄膜厚度、折射率、消光系数、比热容和热导率。此外，还推导了同一单层TiO₂薄膜在不同波长下的光吸收。例如，计算了1986年为美国光学学会年会由12个不同实验室制备的19个单层TiO₂薄膜的表面温度升高。结果与测得的光吸收结果吻合良好。
