Modeling of ultrafast laser ablation into vacuum

Mark Squires, Cholik Chan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Laser-matter interaction is a very complicated phenomenon. There exist three principal regimes for laser pulses, namely long, short, and ultrashort pulse lasers. In the ultrashort regime, the target material is ionized more rapidly than the thermal relaxation time, and the material is ablated without signi.cant transfer of heat to the surrounding lattice. The absence of heat transfer to the surrounding lattice provides important advantages to micromachining: reducing both the material property change due to heating and slag deposition. To further understand the ablation process, a solver using the Space-Time Conservation Element Solution Element (CE/SE) Method is used to describe the material removal based on a gas dynamics model. The model uses a coordinate transformation with an immobilized boundary, .xing the size of the computational domain in time. The expanding computational domain facilitates the use of vacuum boundary conditions. The immobilized boundary is used to explore the expansion the ionized gas into a vacuum. In addition, exploration of the equation of state highlights some shortfalls and errors that require future attention.

Original languageEnglish (US)
Title of host publicationICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings
Publication statusPublished - 2006
EventICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics - Scottsdale, AZ, United States
Duration: Oct 30 2006Nov 2 2006

Other

OtherICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics
CountryUnited States
CityScottsdale, AZ
Period10/30/0611/2/06

Cite this

Squires, M., & Chan, C. (2006). Modeling of ultrafast laser ablation into vacuum. In ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings [M302]