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

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 …

The exciton, a bound state of an electron and a hole, is a fundamental quasiparticle induced
by coherent light–matter interactions in semiconductors. When the electrons and holes are …

Circularly polarized photons are known to generate a directional helicity-dependent
photocurrent in three-dimensional topological insulators at room temperature. Surprisingly …

All-optical control of terahertz pulses is essential for the development of optoelectronic
devices for next-generation quantum technologies. Despite substantial research in THz …

We study the microscopic origins of photocurrent generation in the topological insulator Bi 2
Se 3 via time-and angle-resolved photoemission spectroscopy. We image the unoccupied …

Ultrafast charge and spin dynamics have immense effects on the applications of topological
insulators (TIs). By performing spin-adiabatic nonadiabatic molecular dynamics simulations …

We present a novel theoretical approach to simulate spin, time, and angular-resolved
photoelectron spectroscopy (ARPES) from first-principles that is applicable to surfaces, thin …

In this study, we report the ultrafast excitation and dynamics of the carrier and photocurrent
in a 3D typical topological insulator Sb 2 Te 3. We utilize time-resolved optical pump-THz …

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