Characterization of an Aluminum Laser-Induced Plasma at Low Fluence in Ambient Air with Time and Spatial Resolution
Abstract
Plasmas produced by interaction of a laser with a solid target under moderate fluence conditions (typically 10 J/cm^2) are of great interest for various applications, including synthesis of thin films and nanomaterials, and laser-induced plasma spectroscopy. Despite this interest, there are relatively little systematic investigation of the characteristics of such plasmas. In this work, we examine a plasma produced from aluminum under atmospheric environment. Using spectroscopic diagnostics, we examine the time and space dependence of temperature and electron density of the plasma. The influence of the laser pulse wavelength (from 266 to 1064 nm) and duration (from 80 fs to 8 ns) on these parameters is also investigated. We show that the plasma is spatially uniform and that plasma expansion occurs isotropically over a typical distance of 1 mm.
- Publication:
-
APS Annual Gaseous Electronics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..GECFT2004B