View in EDS PDF Full Text

Modification of Femtosecond Laser Absorption by Electron Beam Irradiation.

Saved in:
Bibliographic Details
Title: Modification of Femtosecond Laser Absorption by Electron Beam Irradiation.
Authors: Schneider, Nicolai1,2 nicolai.schneider@lpt.uni-erlangen.de, Chechik, Lova1,2, Schmidt, Michael1,2, Cvecek, Kristian1,2
Source: Journal of Laser Micro / Nanoengineering. Nov2025, Vol. 20 Issue 3, p198-203. 6p.
Subjects: Femtosecond lasers, Multiphoton ionization, Glass, Multiphoton absorption, Laser damage, Electron beams, Surface morphology, Dielectric materials
Abstract: Dielectric materials interact with ultra-fast lasers through various nonlinear absorption mechanisms, leading to ionization of the material. Specifically, quasi-free electrons are generated in the conduction band via multiphoton ionization (MPI) or tunneling ionization. When the density of these quasi-free electrons exceeds a critical threshold, ablation of the material occurs. In this work, the influence of extrinsically seeded electrons on the laser ablation threshold and the crater morphology on soda-lime glass for femtosecond laser single-shot experiments is investigated. For this, the laser was focused inside a modified scanning electron microscope, where the soda-lime glass samples were installed. Results show that irradiation with extrinsic electrons, provided by the SEM electron gun, can increase the ablation volume and decrease the ablation threshold. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Laser Micro / Nanoengineering is the property of Japan Laser Processing Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Dielectric materials interact with ultra-fast lasers through various nonlinear absorption mechanisms, leading to ionization of the material. Specifically, quasi-free electrons are generated in the conduction band via multiphoton ionization (MPI) or tunneling ionization. When the density of these quasi-free electrons exceeds a critical threshold, ablation of the material occurs. In this work, the influence of extrinsically seeded electrons on the laser ablation threshold and the crater morphology on soda-lime glass for femtosecond laser single-shot experiments is investigated. For this, the laser was focused inside a modified scanning electron microscope, where the soda-lime glass samples were installed. Results show that irradiation with extrinsic electrons, provided by the SEM electron gun, can increase the ablation volume and decrease the ablation threshold. [ABSTRACT FROM AUTHOR]
ISSN:18800688
DOI:10.2961/jlmn.2025.03.2004