In quantum materials, emergent functional properties resulting from strong correlations or
electronic topology offer opportunities for new applications. Over the past decade, ultrafast …

Recent progress in high power ultrafast short-wave and mid-wave infrared lasers has
enabled gas-phase high harmonic generation (HHG) in the water window and beyond, as …

Attosecond metrology sensitive to sub-optical-cycle electronic and structural dynamics is
opening up new avenues for ultrafast spectroscopy of condensed matter. Using intense …

We present a systematic study of the crystal-orientation dependence of high-harmonic
generation in monolayer transition-metal dichalcogenides, WS 2 and MoSe 2, subjected to …

A series of theoretical and experimental results has proved that harmonics below/above the
band gap are produced mainly by the intraband current/interband polarization for solids in …

Symmetries are ubiquitous in condensed matter physics, playing an important role in the
appearance of different phases of matter. Nonlinear light matter interactions serve as a …

Intense lasers can easily drive nonadiabatic transitions of excited electron wave packets
across the Brillouin zones, thus transition dipole moments (TDM) between energy bands of …

High harmonic generation in atomic or molecular targets stands as a robust mechanism to
produce coherent ultrashort pulses with controllable polarization in the extreme-ultraviolet …

Recent studies have demonstrated that the polarization states of high harmonics from solids
can differ from those of the driving pulses. To gain insights on the microscopic origin of this …

The interaction of strong near-infrared (NIR) laser pulses with wide-bandgap dielectrics
produces high harmonics in the extreme ultraviolet (XUV) wavelength range. These …