title: Residual stress in Ta2O5-SiO2 composite thin-film rugate filters prepared by radio frequency ion-beam sputtering.
abstract: 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.
authors.affiliation: Department of Optics and Photonics, Thin Film Technology Center, National Central University, Chung-Li 320, Taiwan.
authors.forename: Chien-Jen
authors.initials: CJ
authors.lastname: Tang
authors.forename: Cheng-Chung
authors.initials: CC
authors.lastname: Jaing
authors.forename: Kuan-Shiang
authors.initials: KS
authors.lastname: Lee
authors.forename: Cheng-Chung
authors.initials: CC
authors.lastname: Lee