High-harmonic generation in alpha-quartz by the electron-hole recombination

Abstract

A calculation of the high-harmonic generation (HHG) in $\alpha$-quartz using the time-dependent density functional theory is reported. The inter-band process is attributed to the dominant in HHG above the band gap. The photon energy is set to 1.55 eV, and the cutoff energy of the plateau region is found to be limited at the 19th harmonic (30 eV). The dependence of the HHG efficiency at the cutoff energy region on laser intensity is consistent with that of the hole density in the lowest-lying valence band. Numerical results indicate that electron-hole recombination plays a crucial role in HHG in $\alpha$-quartz. It is found that a 200 attosecond pulse train is produced using HHG around the plateau cutoff energy.

7pages, 8 figures

References in corpus (2)

• Strong-Field Perspective on High-Harmonic Radiation from Bulk Solids
• The Effect of Multiple Conduction Bands on High Harmonic Emission from Dielectrics

Cited by in corpus (4)

• Impact of the electronic band structure in high-harmonic generation spectra of solids
• High-order harmonic generation in solid slabs beyond the single active electron
• High-harmonic generation in quantum spin systems
• Crystal-momentum-resolved contributions to multiple plateaus of high-order harmonic generation from band-gap materials