Title

A Combined Model and its Verification for Femtosecond-Pulse Materials Interactions

Abstract

This paper reports the overall picture of our ongoing efforts to establish the scientific understanding of ultrafast, non-equilibrium laser-material interactions from nanometer to milimeter and from femtosecond to microsecond through comprehensive, integrated multiscale physico-chemical modeling and experimental verification. A novel plasma model with quantum treatments is developed to account for significantly varying optical properties. The model is used to successfully predict two uncommon phenomena that is experimentally observed: 1) a flat-bottom crater shape created by a Gaussian beam and 2) repeatable nanoscale structures achieved by pulse train technology. The well known two-temperature model is improved by considering the quantum effects of different heat carriers and then is used to accurately predict the damage thresholds for metals. Preliminary results for these ongoing modeling efforts are reported in this article. Copyright © 2008 by ASME.

Meeting Name

2nd International Conference on Integration and Commercialization of Micro and Nanosystems, MicroNano 2008 (2008: Jun. 3-5, Clear Water Bay, Hong Kong)

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 American Society of Mechanical Engineers (ASME), All rights reserved.

Publication Date

05 Jun 2008

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