Modeling ionization dynamics during Bessel beam propagation with a Particle-In-Cell code

Pierre-Jean Charpin; Remo Giust; François Courvoisier

doi:10.1117/12.3017559

20 June 2024 Modeling ionization dynamics during Bessel beam propagation with a Particle-In-Cell code

Pierre-Jean Charpin, Remo Giust, François Courvoisier

Proceedings Volume PC13005, Laser + Photonics for Advanced Manufacturing ; PC130050I (2024) https://doi.org/10.1117/12.3017559
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

Understanding laser-induced plasma formation dynamics is pivotal for controlling the energy density deposited within the solid dielectrics during ultrafast laser material processing. Conventional numerical codes, however, fail to reproduce the propagation dynamics of tightly focused Bessel beams, which are widely used for stealth dicing. We adapted the massively parallel Particle-In-Cell (PIC) code EPOCH, incorporating background permittivity and Keldysh field- and impact-ionization modules. We compare numerical simulations to experimental results across various imaging diagnostics. Our simulations enabled the identification of the pivotal processes governing dense plasma formation and reproduced the high energy density experimentally observed.

Conference Presentation

Citation Download Citation

Pierre-Jean Charpin, Remo Giust, and François Courvoisier "Modeling ionization dynamics during Bessel beam propagation with a Particle-In-Cell code", Proc. SPIE PC13005, Laser + Photonics for Advanced Manufacturing , PC130050I (20 June 2024); https://doi.org/10.1117/12.3017559

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