Tuning the electronic band structure of metal surfaces for enhancing high-order harmonic generation
arXiv:2103.12174 · doi:10.1063/5.0049532
Abstract
High harmonic generation (HHG) from condensed matter phase holds promise to promote future cutting-edge research in the emerging field of attosecond nanoscopy. The key for the progress of the field relies on the capability of the existing schemes to enhance the harmonic yield and to push the photon energy cutoff to the extreme ultraviolet (XUV, 10-100 eV) regime and beyond towards the spectral "water window" region (282-533 eV). Here, we demonstrate a coherent control scheme of HHG, which we show to give rise to quantum modulations in the XUV region. The control scheme is based on exploring surface states in transition-metal surfaces, and specifically by tuning the electronic structure of the metal surface itself together with the use of optimal chirped pulses. Moreover, we show that the use of such pulses having moderate intensities permits to push the harmonic cutoff further to the spectral water window region, and that the extension is found to be robust against the change of the intrinsic properties of the material. The scenario is numerically implemented using a minimal model by solving the time-dependent Schrodinger equation for the metal surface Cu(111) initially prepared in the surface state. Our findings elucidate the importance of metal surfaces for generating coherent isolated attosecond XUV and soft-x-ray pulses and for designing compact solid-state HHG devices.
arXiv comment9 pages, 4 figures
References in corpus (20)
- Ultrastrong coupling between light and matter
- Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
- Real-time observation of interfering crystal electrons in high-harmonic generation
- Attosecond physics at the nanoscale
- 0.5 keV soft X-ray attosecond continua
- High harmonic imaging of ultrafast many-body dynamics in strongly correlated systems
- Topological strong field physics on sub-laser cycle time scale
- Interband resonant high-harmonic generation by valley polarized electron-hole pairs
- Imperfect Recollisions in High-Harmonic Generation in Solids
- Wannier-Bloch approach to localization in high harmonics generation in solids
- High-Harmonic generation from spin-polarised defects in solids
- Theoretical description of high-order harmonic generation in solids
- Enhanced high-order harmonic generation in donor-doped band-gap materials
- High-order harmonic generation of doped semiconductor
- Phase-matching mechanism for high-harmonic generation in the overdriven regime driven by few-cycle laser pulses
- Gauge invariance and the interpretation of inter- and intraband processes in high-order harmonic generation from bulk solids
- Control of high-harmonic generation by tuning the electronic structure and carrier injection
- High-order harmonic generation from 2D periodic potentials in circularly and bichromatic circularly polarized laser fields
- Sub-band picture of high-harmonic generation in solids
- Tuning High-Harmonic Generation by Controlled Deposition of Ultrathin Ionic Layers on Metal Surfaces