Time-integrated reflectivity of laser-induced back-ablated aluminum thin film targets
- 15 August 1997
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 82 (4), 1828-1831
- https://doi.org/10.1063/1.366289
Abstract
A study of the time-integrated reflectivity of Al targets during laser-induced back ablation by 1064 nm, 10 ns laser pulses is reported. The Al target reflectance data is analyzed using a model which includes not only Al surface removal but also the possible production of Alplasma. Calculations based on a sharp Al film ablation fluence (J th ≈710 mJ/cm 2 ) threshold agree with the reflectance data. Plasma reflectance contribution is found to be negligible for plasma electron densities of less than 0.3 critical density.Keywords
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