Optical properties and residual stress of YbF3 thin films deposited at different temperatures.
The influence of deposition temperature on the optical properties, microstructure, and residual stress of YbF(3) films, deposited by electron-beam evaporation, has been investigated. The increased refractive indices and surface roughness of YbF(3) films indicate that the film density and columnar structure size increase with deposition temperature. At the same time, higher packing density reduces absorption of moisture. The residual stress is related to deposition temperature and to substrate. For the samples deposited on BK7, the residual stress mainly comes from intrinsic stress, however, for those on fused silica, thermal stress is the dominant factor of total residual stress.
Wang
Ying
Y
State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China.
Zhang
Yue-guang
YG
Chen
Wei-lan
WL
Shen
Wei-dong
WD
Liu
Xu
X
Gu
Pei-fu
PF