Extended Data Fig. 2: High-harmonic generation in MgF₂ (theory).

High-harmonic spectra calculated by TDDFT simulations (red curve) and by use of the scattering model (blue curve) for laser parameters (ħω_L = 2eV and F₀ = 0.9 V Å⁻¹) and crystal orientation settings as quoted in Fig. 1d.