Open AccessHigh surface laser-induced damage threshold of SrB4O7 single crystals under 266-nm (DUV) laser irradiation
Author(s) -
Yasunori Tanaka,
Ryosuke Murai,
Yoshinori Takahashi,
Tsuyoshi Sugita,
Daisetsu Toh,
Kazuto Yamauchi,
Sora Aikawa,
Haruki Marui,
Yuji Umeda,
Yusuke Funamoto,
Tomosumi Kamimura,
Melvin John F. Empizo,
Masayuki Imanishi,
Yusuke Mori,
Masashi Yoshimura
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.401777
Subject(s) - materials science , irradiation , laser , crystal (programming language) , optics , etching (microfabrication) , ultraviolet , single crystal , optoelectronics , layer (electronics) , chemistry , nanotechnology , crystallography , physics , computer science , nuclear physics , programming language
Under 266-nm (deep ultraviolet, DUV) laser irradiation, an SrB 4 O 7 (SBO) single crystal has been found to exhibit a surface laser-induced damage threshold (LIDT) of ∼ 16.4 J/cm 2 , which is higher than those of a synthetic silica glass (4.8 J/cm 2 ) and a calcium fluoride (CaF 2 ) crystal (11.4 J/cm 2 ). By catalyst-referred etching (CARE), the LIDT of an SBO crystal can also be improved to around 24.1 J/cm 2 , which is 1.4 and 6.0 times higher compared to an unetched crystal and a silica glass, respectively. With high surface LIDTs, SBO single crystals can then be used as optical window materials for high-power DUV laser systems.