Extended Data Fig. 1: Strong field-driven electron dynamics in MgF2 (ħωL = 2eV).

a–c, Comparison of crystal (νc; blue curves) and free (νfree; red dashed curves) electron velocities along the [100] direction of an MgF2 crystal as calculated by TDDFT for laser field strengths F0 of 0.1 V Å−1 (a), 0.9 V Å−1 (b) and 2.0 V Å−1, and carrier at an energy of ħωL = 2eV.