Microscopic Energy Transport Through Photon-Electron-Phonon Interactions During Ultrashort Laser Ablation of Wide Bandgap Materials. Part I: Photon Absorption

Abstract

The new phenomena induced by femtosecond lasers lead to the new area of ultrafast science. It is a significant challenge to explain the phenomena associated with complex non-equilibrium and non-linear processes. Although there is a growing body of experimental observation, a comprehensive model remains undeveloped. We review the challenges in understanding the photon absorption stage mainly for the femtosecond ablation of wide bandgap materials at the intensities of 1013-1014 W/cm2. Major opinions and challenges in ionization mechanisms are presented by primarily considering multiphoton ionization and avalanche ionization.

Department(s)

Mechanical and Aerospace Engineering

Keywords and Phrases

Avalanche Ionization; Femtosecond Laser Ablation; Multiphoton Ionization; Photon-Electron Interactions; Wide Bandgap Materials

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 Science Press, All rights reserved.

Publication Date

01 Jan 2009

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