The physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

Recent progress in utilizing ultrafast light-matter interaction to control the macroscopic
properties of quantum materials is reviewed. Particular emphasis is placed on photoinduced …

Angle-resolved photoemission spectroscopy (ARPES), with its exceptional sensitivity to both
the binding energy and the momentum of valence electrons in solids, provides unparalleled …

Active optical control over matter is desirable in many scientific disciplines, with prominent
examples in all-optical magnetic switching,, light-induced metastable or exotic phases of …

The advent of pump-probe spectroscopy techniques paved the way to the exploration of
ultrafast dynamics of electrons and phonons in crystalline solids. Following photo-absorption …

Plasmonics is a rapidly growing field spanning research and applications across chemistry,
physics, optics, energy harvesting, and medicine. Ultrafast photoemission electron …

Frontier orbitals determine fundamental molecular properties such as chemical reactivities.
Although electron distributions of occupied orbitals can be imaged in momentum space by …

Time-and angle-resolved photoemission spectroscopy (trARPES) employing a 500 kHz
extreme-ultraviolet light source operating at 21.7 eV probe photon energy is reported. Based …

Photoexcited molecular trajectories on potential energy surfaces (PESs) prior to
thermalization are intimately connected to the photochemical reaction outcome. The excited …

Chirality-driven optical properties in charge density waves are of fundamental and practical
importance. Here, we investigate the interaction between circularly polarized light and …