Prediction of Crater Shape in Femtosecond Laser Ablation of Dielectrics
This paper reports on a new model to investigate the femtosecond laser ablation of dielectrics by considering the time and space dependent optical properties of highly ionized dielectrics. A quantum treatment is employed to determine the free electron heating and the free electron relaxation time in the dense plasma. The proposed model greatly improves the prediction precision of ablation depth and can predict the crater shape of femtosecond laser ablation of dielectrics. The predicted ablation depths are in agreement with published experimental data for the example of barium aluminium borosilicate. Some interesting phenomena observed experimentally can be well explained by the proposed model.
L. Jiang and H. Tsai, "Prediction of Crater Shape in Femtosecond Laser Ablation of Dielectrics," Journal of Physics D: Applied Physics, Institute of Physics - IOP Publishing, Jan 2004.
The definitive version is available at http://dx.doi.org/10.1088/0022-3727/37/10/012
Mechanical and Aerospace Engineering
National Science Foundation (U.S.)
Keywords and Phrases
Electron Heating; Femtosecond Laser; Dielectrics
Article - Journal
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