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 …

Strong light fields have created opportunities to tailor novel functionalities of solids,,,–.
Floquet–Bloch states can form under periodic driving of electrons and enable exotic …

High-harmonic generation (HHG) in solids has emerged in recent years as a rapidly
expanding and interdisciplinary field, attracting attention from both the condensed-matter …

We report the observation of an anomalous nonlinear optical response of the prototypical
three-dimensional topological insulator bismuth selenide through the process of high-order …

Higher-order optical harmonics entered the realm of nanostructured solids being observed
recently in optical gratings and metasurfaces with a subwavelength thickness. Structuring …

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 …

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 …