In quantum materials, emergent functional properties resulting from strong correlations or
electronic topology offer opportunities for new applications. Over the past decade, ultrafast …

Weyl semimetals are topological materials whose electron quasiparticles obey the Weyl
equation. They possess many unusual properties that may lead to new applications. This is …

High harmonic generation (HHG) has developed in recent years as a promising tool for
ultrafast materials spectroscopy. At the forefront of these advancements, several works …

As a promising avenue to obtain a new extreme ultraviolet light source and detect electronic
properties, high-harmonic generation (HHG) has been actively developed in both theory and …

High-harmonic generation (HHG), an extreme nonlinear optical phenomenon beyond the
perturbation regime, is of great significance for various potential applications, such as high …

Surface nonlinear optics are essential for developments in integrated photonics and
micro/nano optoelectronics. However, the nonlinear optical conversion efficiency on a …

Circularly polarized light fails to generate currents in inversion-symmetric Weyl semimetals
with degenerate Weyl nodes. While each node generates current with the direction …

An ultra-low pump intensity and high photon flux have been long pursuits of high harmonic
generation (HHG) in solids. However, there is lack of a criterion to identify a pristine solid …

The successful realization of the topological Weyl semimetals has revolutionized
contemporary physics. In recent years, multi-Weyl semimetals, a class of topological Weyl …

Anomalous high-harmonic generation (HHG) arises in certain solids when irradiated by an
intense laser field, originating from a Berry-curvature-induced perpendicular anomalous …