23 November 2015 First principles simulation of laser-induced periodic surface structure using the particle-in-cell method
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Abstract
We present our results of a fundamental simulation of a periodic grating structure formation on a copper target during the femtosecond-pulse laser damage process, and compare our results to recent experiment. The particle-in-cell (PIC) method is used to model the initial laser heating of the electrons, a two-temperature model (TTM) is used to model the thermalization of the material, and a modified PIC method is employed to model the atomic transport leading to a damage crater morphology consistent with experimental grating structure formation. This laser-induced periodic surface structure (LIPSS) is shown to be directly related to the formation of surface plasmon polaritons (SPP) and their interference with the incident laser pulse.
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Robert A. Mitchell, Robert A. Mitchell, Douglass W. Schumacher, Douglass W. Schumacher, Enam A. Chowdhury, Enam A. Chowdhury, } "First principles simulation of laser-induced periodic surface structure using the particle-in-cell method", Proc. SPIE 9632, Laser-Induced Damage in Optical Materials: 2015, 96320Y (23 November 2015); doi: 10.1117/12.2195006; https://doi.org/10.1117/12.2195006
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