Ultrafast Science / 2021 / Article / Fig 2

Research Article

Neighboring Atom Collisions in Solid-State High Harmonic Generation

Figure 2

Comparison between the quantum and the classical simulations for MgO. (a–c) Time-frequency analysis of total HHG obtained from the numerical solutions of SBEs. (d–f) Time-frequency analysis of HHG only including the contribution of electron trajectories tunneling at around the point; the dashed and solid lines indicate the emitted harmonic energy as a function of ionization (dashed lines) and recombination (solid lines) times in the semiclassical simulations. All spectral intensities in color map are on a logarithmic scale. To indicate the time scale, the waveform of the incident laser electric field is shown by the blue dashed lines in (b) and (e).