Open AccessMechanisms of picosecond laser-induced damage in common multilayer dielectric gratings
Author(s) -
Brittany N. Hoffman,
A. A. Kozlov,
N. Liu,
Huaqing Huang,
J. B. Oliver,
Amy L. Rigatti,
T. J. Kessler,
Alexander A. Shestopalov,
Stavros G. Demos
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.395197
Subject(s) - materials science , grating , optics , laser , picosecond , dielectric , diffraction grating , optoelectronics , physics
The modifications of multilayer dielectric (MLD) gratings arising from laser-induced damage using 0.6-ps and 10-ps laser pulses at 1053 nm are investigated to better understand the damage-initiation mechanisms. Upon damage initiation, sections of the affected grating pillars are removed, thereby erasing the signature of the underlying mechanisms of laser damage. To address this issue, we performed paired studies using macroscopic grating-like features that are 5 mm in width to reveal the laser-damage morphology of the different grating sections: pillar side wall, sole, and pillar top. The results suggest that, similarly to MLD coatings, there are two damage-initiation mechanisms corresponding to the different pulse durations.