THz-driven strong-field dynamics in solids: High-harmonic generation and quasiparticle collisions

Using intense, phase-locked multi-THz waveforms, we drive high-harmonic generation and quasiparticle collisions in solids, on sub-optical-cycle scales. By exploiting the crystal symmetry, we shape the high-harmonic field and control the polarization of the emission. Many-body effects and intraband acceleration are investigated by high-order sideband generation.