Simulation of ultrashort laser pulse absorption at the water-metal interface in laser - Induced plasma micromachining

Jiaxi Xie, Kornel Ehmann, Jian Cao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This work proposes a physically consistent numerical model to simulate ultrashort laser absorption by a metallic workpiece at the water-metal interface when optical breakdown of the dielectric occurs. The simulation couples the framework of the finite difference time-domain method used in computational electromagnetics with the constitutive relation derived from both the model of direct ablation of metals and the first-order model of water breakdown. The simulation is used to describe interface ablation processes such as laser-induced plasma micromachining (LIPMM). Applied to the water-aluminum interface, the model is able to describe the metal absorption and the dielectric breakdown threshold in three-dimensional (3D) geometry. It is an extensible monolithic approach in which the absorption by different materials can be described by simply changing the constitutive relations.

Original languageEnglish (US)
Article number041009
JournalJournal of Micro and Nano-Manufacturing
Volume8
Issue number4
DOIs
StatePublished - Dec 2020

Keywords

  • Laser ablation
  • Modeling
  • Numerical simulations
  • Plasma processes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Process Chemistry and Technology
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'Simulation of ultrashort laser pulse absorption at the water-metal interface in laser - Induced plasma micromachining'. Together they form a unique fingerprint.

Cite this