Figure 2
From: The simplest route to generating a train of attosecond pulses
Exploration of optimum solutions using the NEC method. (a) Peak variation in the intensity waveforms as a function of the thickness of the fused-silica-glass plate. (b) The optimum solutions found using the NEC method for the three cases of (I) one plate, (II) two plates and (III) three plates.
