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 …

High-harmonic generation (HHG) in solids has emerged in recent years as a rapidly
expanding and interdisciplinary field, attracting attention from both the condensed-matter …

As a quantum material, Weyl semimetal has a series of electronic-band-structure features,
including Weyl points with left and right chirality and corresponding Berry curvature, which …

This paper has been prepared by the Symphony collaboration (University of Warsaw,
Uniwersytet Jagielloński, DESY/CNR and ICFO) on the occasion of the 25th anniversary of …

High-harmonic spectroscopy, an ultrafast all-optical technique initially conceptualized in
atomic and molecular systems, has now emerged as a powerful platform for studying the …

We theoretically investigate high-harmonic generation in hexagonal boron nitride with
linearly polarized laser pulses. We show that imperfect recollisions between electron-hole …

High-order harmonic generation in solids, the nonlinear up-conversion of coherent radiation
resulting from the interaction of a strong and short laser pulse with a solid sample, has come …

The growing interest in transition metal dichalcogenides (TMDs) has encouraged
researchers to focus on their nonlinear optical properties, such as harmonic generation …

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 …

In the field of nonlinear optics, graphene has shown astounding nonlinear properties,
including the generation of harmonics across a wide frequency range. Harmonic generation …