Fig. 1: High-order wave mixing in fused silica.
From: Enhancing the efficiency of high-order harmonics with two-color non-collinear wave mixing in silica
a Experimental arrangement. b Far-field spectrum of XUV wave mixing in silica. WMOs are spectrally dispersed horizontally and propagate vertically. WMOs generated only from 800 nm or 400 nm propagate at 0 mrad or 30 mrad, respectively. Harmonic orders refer to multiples of the 800-nm fundamental. c Yield of different WMOs as a function of the intensity of the 400-nm pulse. The solid lines are power laws, whose exponent is indicated in the plot. The different WMOs are vertically offset for clarity. The intensity of the 800-nm pulse was 10.5 TW/cm2.
