Hui Wei

TL;DR: It is shown that harmonics can be enhanced by one to two orders of magnitude without an increase in the total laser power if the laser's waveform is optimized by synthesizing two- or three-colour fields.

TL;DR: Using a simple one-dimensional two-band model, it is demonstrated that the observed odd harmonics is directly related to the orientation dependence of the magnitude of the transition dipole, while even harmonic is directlyrelated to the phase of the Transition dipole.

TL;DR: The tunable temporal gate between excitation and termination of the resonance allows us to follow the formation of a Fano line shape in time, and agreement with ab initio calculations validates the experimental time-gating technique for addressing an even broader range of topics, such as the emergence of electron correlation, the onset of electron-internuclear coupling, and quasi-particle formation.

TL;DR: In this article, the nonzero transition dipole phase (TDP) was shown to lead to the appearance of even harmonics in high-order harmonic spectra from solid materials driven by single-color multicycle laser fields.

TL;DR: In this paper, the elementary processes of excitation and ionization of atomic hydrogen in an intense 800-nm pulse with intensity in the 1.0 to 2.2$ range were studied.