High harmonics from backscattering of delocalized electrons
arXiv:2102.11208 · doi:10.1103/PhysRevA.105.L041101
Abstract
It is shown that electron backscattering can enhance high-harmonic generation in periodic systems with broken translational symmetry. Paradigmatically, we derive for a finite chain of atoms the harmonic cutoff due to electrons backscattered from the edges of the chain and demonstrate a maximum in the harmonic yield if twice the quiver amplitude of the driven electrons equals the chain length. For an intuitive understanding of our quantum results we develop a refined semiclassical trajectory model with finite electron-hole separation after tunneling. We demonstrate that the same "tunnel exit" also holds for interband harmonics in conventional periodic solid-state systems.
arXiv comment5 pages, 3 figures, REVTeX 4.2
References in corpus (12)
- Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
- Impact of the electronic band structure in high-harmonic generation spectra of solids
- High-harmonic generation in solids with and without topological edge states
- Topological strong field physics on sub-laser cycle time scale
- Trajectory analysis of high-harmonic generation from periodic crystals
- Imperfect Recollisions in High-Harmonic Generation in Solids
- Irregular orbits generate higher harmonics
- High-order harmonic generation in solid slabs beyond the single active electron
- Finite-system effects on high-harmonic generation: from atoms to solids
- Ultrahigh harmonics from laser-assisted ion-atom collisions
- Crystal-momentum-resolved contributions to multiple plateaus of high-order harmonic generation from band-gap materials
- Electron-Backscattering-Assisted High Harmonic Generation from Bilayer Nanostructures