Lawrence Berkeley National Laboratory

Open boundaries are essential in the modeling of many applications including laser plasma acceleration in a boosted frame, for which it has been shown that pseudo-spectral solvers (which can also be viewed as the limit of higher order FDTD methods when the order goes to infinity) bring higher stability and accuracy . When modeling the absorption of outgoing waves in simulations with open boundaries condition, Perfectly Matched Layers (PML) [1] are the state of the art and can be applied to the pseudo-spectral solvers. This paper will present results from the application of the PMLto the absorption of waves with high order FDTD and pseudo-spectral solvers in 1D and 2D.