Residual stress in Ta2O5-SiO2 composite thin-film rugate filters prepared by radio frequency ion-beam sputtering.
Ta-Si oxide composite thin-film rugate filters were prepared by radio frequency ion-beam sputtering and their residual stress and substrate deflections were measured. The residual stress and substrate deflection of these composite film rugate filters were less than that of notch filters made from a series of discrete quarter-wave layers with alternate high and low indices because of the smooth modulation of composition and no interface structure of the rugate filter.
Tang
Chien-Jen
CJ
Department of Optics and Photonics, Thin Film Technology Center, National Central University, Chung-Li 320, Taiwan.
Jaing
Cheng-Chung
CC
Lee
Kuan-Shiang
KS
Lee
Cheng-Chung
CC