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 …

Femtosecond mode-locked lasers producing visible/infrared frequency combs have steadily
advanced our understanding of fundamental processes in nature. For example, optical …

In the 60 years since the invention of the laser, the scientific community has developed
numerous fields of research based on these bright, coherent light sources, including the …

The dynamics of momentum-dark exciton formation in transition metal dichalcogenides is
difficult to measure experimentally, as many momentum-indirect exciton states are not …

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 …

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

In the last decade, there has been a proliferation of laser sources for time-and angle-
resolved photoemission spectroscopy (TR-ARPES), building on the proven capability of this …

Detection of the energy conversion pathways between photons, charge carriers, and the
lattice is of fundamental importance to understand fundamental physics and to advance …

Ultrafast spectroscopies can access the dynamics of electrons and nuclei at short
timescales, shedding light on nonequilibrium phenomena in materials. However …