Computer modeling of the interaction of a laser-ablated plume with an ambient background gas

Jean-Noel G. LeBoeuf; Richard F. Wood; Kuan-Ren Chen; David B. Geohegan; Alexander A. Puretzky

doi:10.1117/12.380794

23 March 2000 Computer modeling of the interaction of a laser-ablated plume with an ambient background gas

Jean-Noel G. LeBoeuf, Richard F. Wood, Kuan-Ren Chen, David B. Geohegan, Alexander A. Puretzky

Author Affiliations +

Proceedings Volume 3935, Laser Plasma Generation and Diagnostics; (2000) https://doi.org/10.1117/12.380794
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

Abstract

It is now well established that thin films of a wide variety of materials can be deposited by ablation of a target material by a laser. Here, expansion of the laser-ablated plume in vacuum and in a background gas is comparatively studied using continuum hydrodynamics models, molecular gas dynamics models, and a recently developed multiple scattering model which combines continuum hydrodynamics and inter-species collisions. Continuum hydrodynamics models and molecular gas dynamics models predict, for the most part, that background plasma would reach the deposition substrate (or an ion probe placed at the same distance away from the target) first. On the other hand, the multiple scattering model shows that a component of the plume can indeed reach the substrate at vacuum speed, followed by a second plume component which is more or less slowed down by the presence of the background gas depending on its ambient pressure. Quantitative fits to the experimental data have been obtained with this multiple scattering model for expansion of Silicon in Helium and in Argon. The successful application of the multiple scattering model serves to explain the phenomenon of 'plume splitting' which is frequently observed in laser ablation processes for thin film deposition.

Citation Download Citation

Jean-Noel G. LeBoeuf, Richard F. Wood, Kuan-Ren Chen, David B. Geohegan, and Alexander A. Puretzky "Computer modeling of the interaction of a laser-ablated plume with an ambient background gas", Proc. SPIE 3935, Laser Plasma Generation and Diagnostics, (23 March 2000); https://doi.org/10.1117/12.380794

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