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 …

The low-energy, long-lived isomer in 229 Th, first studied in the 1970s as an exotic feature in
nuclear physics, continues to inspire a multidisciplinary community of physicists. It has …

An exciton, a two-body composite quasiparticle formed of an electron and hole, is a
fundamental optical excitation in condensed matter systems. Since its discovery nearly a …

Time-resolved photoemission with ultrafast pump and probe pulses is an emerging
technique with wide application potential. Realtime recording of nonequilibrium electronic …

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 …

Time-of-flight-based momentum microscopy has a growing presence in photoemission
studies, as it enables parallel energy-and momentum-resolved acquisition of the full …

The construction of type-II van der Waals heterostructure is an effective method to design
efficient photocatalysts. In this study, we constructed the PtSe2/SiH van der Waals …

This review outlines fundamental principles, instrumentation, and capabilities of angle-
resolved photoemission spectroscopy (ARPES) and microscopy. We will present how high …

High-order harmonic generation (HHG) is currently utilized for developing compact table-top
radiation sources to provide highly coherent extreme ultraviolet (XUV) and soft X-ray pulses; …