Fig. 7
From: Extreme–ultraviolet high–harmonic generation in liquids
Sensitivity of HHG spectra to the band gap. a–c, Spectra calculated from the numerical solution of the SBE, using the water electronic structure with the band gap changed from Eg0 = 6.2 eV to Eg0 + 2ħω0 and Eg0 + 4ħω0. Destructive interference resulting in a local minimum at harmonic 11, 13, 15, can be clearly observed. For clarity of the demonstration, spatial integration was turned off in these calculations and a weaker electric field strength of 0.7 V/Å has been used
