Laser-material interaction of single-crystal and polycrystalline alumina

Poh Yin Chong; Gabriel R. Castillo; Javier E. Garay

doi:10.1117/12.3012401

11 April 2024 Laser-material interaction of single-crystal and polycrystalline alumina

Poh Yin Chong, Gabriel R. Castillo, Javier E. Garay

Proceedings Volume PC12939, High-Power Laser Ablation VIII; PC1293905 (2024) https://doi.org/10.1117/12.3012401
Event: SPIE High-Power Laser Ablation, 2024, Santa Fe, New Mexico, United States

Abstract

Single-crystal alumina (sapphire) and transparent polycrystalline alumina are compelling candidates for laser processing in optical applications. In this study, single-shot laser irradiations (~10^15 W/cm2) on sapphire and polycrystalline alumina are investigated. A laser in the femtosecond regime (1030 nm, 490 fs) is used to examine the mechanisms of laser-induced damage on sapphire and polycrystalline alumina. The damage morphologies are characterized using a Scanning Electron Microscope (SEM), Atomic Force Microscopy (AFM), and optical profilometer. When irradiated with a single-shot ultrafast laser pulse, sapphire and polycrystalline alumina show dissimilar damage mechanisms, attributed mainly to the difference in the microstructure. In addition, a quantitative analysis of crater diameter, depth, and volume is conducted. The laser-induced damage thresholds of the materials are determined. The quantitative analysis provides insight into the scaling relationship between the laser parameters and damage morphologies for sapphire and polycrystal alumina.

Conference Presentation

Citation Download Citation

Poh Yin Chong, Gabriel R. Castillo, and Javier E. Garay "Laser-material interaction of single-crystal and polycrystalline alumina", Proc. SPIE PC12939, High-Power Laser Ablation VIII, PC1293905 (11 April 2024); https://doi.org/10.1117/12.3012401

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