title: Effect of oxygen vacancies on the laser-induced damage resistance of Y0.26Hf0.74Ox thin films.
abstract: The influence of the oxygen sub-stoichiometry on the femtosecond laser-induced damage resistance of Y0.26Hf0.74Ox films was investigated in this work. Photoluminescence (PL) spectroscopy was applied to analyze the various states of oxygen vacancies (V(O)), and laser-induced damage measurement was performed using a single 500 fs pulse laser at a wavelength of 1030 nm. Based on the PL spectra, a probable band gap structure with different defect energy levels was obtained, which is significant in explaining an observed inverse correlation between the laser-induced damage threshold (LIDT) and the concentration of V(O). The crystallization and the refractive index, which were previously found to be crucial factors in laser-induced damage resistance of optical thin films, are also closely dependent on the amount of induced oxygen vacancies.
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Chen
authors.forename: Lili
authors.initials: L
authors.lastname: Zhao
authors.forename: Xinjie
authors.initials: X
authors.lastname: Fu
authors.forename: Lijun
authors.initials: L
authors.lastname: You
authors.forename: Olaf
authors.initials: O
authors.lastname: Stenzel
authors.forename: Helena
authors.initials: H
authors.lastname: Kämmer
authors.forename: Felix
authors.initials: F
authors.lastname: Dreisow
authors.forename: Stefan
authors.initials: S
authors.lastname: Nolte
authors.forename: Lixin
authors.initials: L
authors.lastname: Song