Boundary conditions for arbitrarily shaped and tightly focused laser pulses in electromagnetic codes

JOURNAL OF COMPUTATIONAL PHYSICS

卷:321

Article

Thiele, Illia¹  Skupin, Stefan¹  Nuter, Rachel¹ 

[1] Univ Bordeaux, CNRS CEA, Ctr Lasers Intenses & Applicat, UMR 5107, F-33405 Talence, France

关键词: Electromagnetic codes;    Maxwell solver;    Particle-in-cell (PIC) codes;    Tight focusing;    Vector beams;   

DOI  :  10.1016/j.jcp.2016.06.004

来源: Elsevier

【 摘 要 】

Investigation of laser matter interaction with electromagnetic codes requires to implement sources for the electromagnetic fields. A way to do so is to prescribe the fields at the numerical box boundaries in order to achieve the desired fields inside the numerical box. Here we show that the often used paraxial approximation can lead to unexpected field profiles with strong impact on the laser matter interaction results. We propose an efficient numerical algorithm to compute the required laser boundary conditions consistent with the Maxwell's equations for arbitrarily shaped, tightly focused laser pulses. (C) 2016 Elsevier Inc. All rights reserved.

【 授权许可】

Free