Work

Role of absorbed dose in a lifetime of HfO 2 and SiO 2 dielectric coatings

Year: 2025

Type: article

Abstract: )-on-1 laser-induced damage threshold testing and photothermal common-path interferometry across 1030 - 257 nm wavelengths with picosecond pulses. Results show that the absorbed dose required for non-catastrophic damage, such as color change, is nearly constant across wavelengths for a fixed pulse duration and pulse count, decreasing with higher laser intensity. Thermal and laser annealing improves coating lifetimes by reducing absorptance. A proposed phenomenological model links absorption mechanisms to coating lifetime, providing insights into fatigue behavior and enabling non-destructive durability assessments for optical components under intense laser exposure.

Source: Optics Express

DOI: 10.1364/oe.553105

Authors: Erikas Atkočaitis, Austėja Aleksiejūtė, Justinas Galinis, Andrius Melninkaitis

Institution: Universitat Autònoma de Barcelona

Language: English

Topic: Optical Coatings and Gratings

Subfield: Surfaces, Coatings and Films

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: Lietuvos Mokslo Taryba