Figure 5: Harmonic efficiency and plasma dynamics. | Nature Communications

Figure 5: Harmonic efficiency and plasma dynamics.

From: Bright high-order harmonic generation with controllable polarization from a relativistic plasma mirror

Figure 5

(a) Influence of the incidence angle upon the efficiency of the harmonics (13th–30th) with CP and LP laser pulses. The laser amplitude is a0=5 for the CP laser and a0=7.07 for the LP laser to keep the intensity and pulse energy the same. (b) HHG spectra of Ey component, compared between the cases using CP and LP laser pulses at 55° incidence. The green dashed line corresponds to the predicted scaling law IROM(n)∝n−8/3 by the ROM theory. (c,d) Spatial distribution of electron longitudinal (px) and transverse momenta (py and pz) for the case of a CP laser at 55° incidence at two different times of (c) t=28.64T0 and (d) t=30.40T0. In these simulations, the other parameters are: laser amplitude a0=5, plasma density ne=200nc and scale length Ls=0.1. The momenta are normalized by mec. The dashed black lines in panels (c,d) mark the zero momenta.

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