Thermodynamical and morphological instabilities in laser-matter interaction

A. A. Samokhin; S. N. Andreev; I. N. Kartashov; Igor Yu. Smurov

doi:10.1117/12.552985

2 April 2004 Thermodynamical and morphological instabilities in laser-matter interaction

A. A. Samokhin, S. N. Andreev, I. N. Kartashov, Igor Yu. Smurov

Proceedings Volume 5399, Laser-Assisted Micro- and Nanotechnologies 2003; (2004) https://doi.org/10.1117/12.552985
Event: Laser-Assisted Micro- and Nanotechnologies 2003, 2003, St. Petersburg, Russian Federation

Abstract

The possible manifestations of the thermodynamical instability (explosive vaporization) are discussed for different regimes of laser heating of the target. It is shown that repeated explosive vaporization regime can be realized during nanosecond laser pulses provided that nucleation time τ < 10^-10s. This regime can be observed if the surface pressure is lower than the critical pressure P_c of the liquid-vapor phase transition. The laser vaporization front instabilities are investigated for the steady state vaporization regime of absorbing condensed matter. The results of the numerical analysis of the dispersion equation are presented for various values of the target absorption coefficient α and different Mach number M ≤ 1 in the vapor flow. In several cases of bulk absorption (α ≤ 10⁴ cm^-1) the instability increment maximum γ_max is of the order of 10⁹s^-1 and the corresponding wavelength λ_max ≥ 0.3 μm. The dependence of these results and vaporization dynamics on the sticking (condensation) coefficient in vaporization boundary conditions is also analyzed.

Citation Download Citation

A. A. Samokhin, S. N. Andreev, I. N. Kartashov, and Igor Yu. Smurov "Thermodynamical and morphological instabilities in laser-matter interaction", Proc. SPIE 5399, Laser-Assisted Micro- and Nanotechnologies 2003, (2 April 2004); https://doi.org/10.1117/12.552985

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