When solids are exposed to intense laser fields whose forces are comparable to the binding
forces of valence electrons in crystals, nonlinear optics of solids advances to the …

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

Key properties of quantum materials stem from dynamic interaction chains that connect
stable electronic quasiparticles through short-lived coherences, which are difficult to control …

The prediction and realization of topological insulators have sparked great interest in
experimental approaches to the classification of materials,–. The phase transition between …

Interactions of quantum materials with strong laser fields can induce exotic non-equilibrium
electronic states,,,,–. Monolayer transition metal dichalcogenides, a new class of direct-gap …

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 …

High-harmonic spectroscopy, an ultrafast all-optical technique initially conceptualized in
atomic and molecular systems, has now emerged as a powerful platform for studying the …

Petahertz, or lightwave, electronics uses tailored optical waveforms to control charge
carriers in an electronic circuit at petahertz frequencies. This may enable faster processing …

Under strong laser fields, electrons in solids radiate high-harmonic fields by travelling
through quantum pathways in Bloch bands in the sub-laser-cycle timescales. Understanding …

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 …