Control of the electron dynamics in solid-state high harmonic generation on ultrafast time scales by a polarization-skewed laser pulse

Abstract

Since high-order harmonic generation (HHG) from atoms depends sensitively on the polarization of the driving laser field, the polarization gating (PG) technique was developed and applied successfully to generate isolated attosecond pulses from atomic gases. The situation is, however, different in solid-state systems as it has been demonstrated that due to collisions with neighboring atomic cores of the crystal lattice strong HHG can be generated even by elliptically- and circularly-polarized laser fields. Here we apply PG to solid-state systems and find that the conventional PG technique is inefficient for the generation of isolated ultrashort harmonic pulse bursts. In contrast, we demonstrate that a polarization-skewed laser pulse is able to confine the harmonic emission to a time window of less than one-tenth of the laser cycle. This method provides a novel way to control HHG and to generate isolated attosecond pulses in solids.

Electron vortex generations in photoionization of hydrogen atoms by circularly-polarized chirped attosecond pulses

“…The evolution of modern ultrafast laser technology has empowered researchers to observe and manipulate physical, chemical, and biological processes at exceedingly small temporal and spatial scales. These technological developments have facilitated the study of the interaction between light and matter at the atomic and molecular levels, leading to the discovery of new physical effects and laws [2][3][4][5][6][7][8][9]. Among these discoveries, Ramsey interference [10] in laser-produced electron wave packets has been investigated in both Rydberg states [11] and continuum for linearly polarized lasers.…”

Fast crystallization of InSe thin films via pulsed laser welding technique and effect of crystallinity on the optical and dielectric properties

“…Pulsed laser technique under specific operation conditions can enhance the structure and morphology by increasing the number of laser shots in a second [15]. As an interesting feature of pulsed laser operation, broadband isolated attosecond pulses can be produced [16]. These pulses are employed in the studies of the electron and nuclear dynamics on ultrafast time scale [16].…”

“…As an interesting feature of pulsed laser operation, broadband isolated attosecond pulses can be produced [16]. These pulses are employed in the studies of the electron and nuclear dynamics on ultrafast time scale [16]. Pulsed laser welding technique includes many challenges that lead to the fast crystallinity with novel properties that cannot be achieved via traditional methods [17].…”

UV-induced resonant excitations of electrons near the Brillouin zone boundary in solid high harmonic generation

“…It has been found that solid-phase HHG is sensitive to the shape and spectral composition of driving pulses, similar to gas-phase case, which was utilized to control electron dynamics of high harmonic process [48][49][50][51][52].…”