文献类型：期刊文献

英文题名：The study of ultraviolet properties of resistant-boat evaporated LaF₃ films

作者：Shang Shu-Zhen[1];Shao Jian-Da[2];Fan Zheng-Xiu[2];Zhao Zhu-Xin[1]

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

年份：2008

卷号：57

期号：3

起止页码：1941

外文期刊名：ACTA PHYSICA SINICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000254097000108)】；

语种：英文

外文关键词：optical film; depositing temperature; LaF3; optical loss

摘要：The effects of depositing temperature on structure and optical properties of resistant-boat evaporated LaF3 single layers were investigated. The films were produced at different temperatures from 20090 to 350 degrees C by increasing step of 50 degrees C. The optical loss, optical constants, optical band gap and cut-off wavelength were deduced on the basis of the transmittance and reflectance curves. Profile and surface roughness measurement instrument was used to determine the rms surface roughness. Microstructure of the samples was characterized by X-ray diffraction (XRD). It was found that the total optical loss, the grain size and the rms surface roughness increased with the increasing of the depositing temperature at the short wavelength period. And the increasing total optical loss with depositing temperature was attributed to the absorption because the scattering occupied the very low percent in the whole loss. The samples deposited at higher temperature had the higher refractive index and extinction coefficient and lower optical band gap. The cut-off wavelength shifted to the long wavelength as the depositing temperature increased.