Threshold characteristics of short and ultrashort laser pulse ablation of metals

Yuri V. Afanasiev; Nikolai N. Demchenko; Vladimir A. Isakov; Irina N. Zavestovskaia; Boris N. Chichkov

doi:10.1117/12.482112

13 September 2002 Threshold characteristics of short and ultrashort laser pulse ablation of metals

Yuri V. Afanasiev, Nikolai N. Demchenko, Vladimir A. Isakov, Irina N. Zavestovskaia, Boris N. Chichkov

Proceedings Volume 4760, High-Power Laser Ablation IV; (2002) https://doi.org/10.1117/12.482112
Event: International Symposium on High-Power Laser Ablation 2002, 2002, Taos, New Mexico, United States

Abstract

The results of theoretical studies are reported for threshold characteristics of a metal ablation by picosecond and femtosecond laser pulse. Two possible mechanisms of the laser ablation at laser fluence F ≤ F_th are considered: thermal mechanism of ablation connected with a kinetics of a metal-vacuum surface evaporation and the mechanism of ablation connected with a hydrodynamics of a dense matter. The analysis has been made within the framework of a two-temperature model of metals for femtosecond and picosecond region of laser pulse duration and the extended of a two-temperature model of the metal in the case when the surface temperature T_i more than the critical temperature of metals. Analytical expressions for the ablation-threshold fluency F_th as well as the threshold values of the lattice temperature and the characteristic time of lattice temperature decay t_d(F_th) are obtained. This analytical description is in satisfactory agreement with particular numerical calculations.

Citation Download Citation

Yuri V. Afanasiev, Nikolai N. Demchenko, Vladimir A. Isakov, Irina N. Zavestovskaia, and Boris N. Chichkov "Threshold characteristics of short and ultrashort laser pulse ablation of metals", Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002); https://doi.org/10.1117/12.482112

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available