When solids are exposed to intense laser fields whose forces are comparable to the binding
forces of valence electrons in crystals, nonlinear optics of solids advances to the …

High-harmonic generation in atomic gases has been studied for decades, and has formed
the basis of attosecond science. Observation of high-order harmonics from bulk crystals was …

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 …

Valence electrons contribute a small fraction of the total electron density of materials, but
they determine their essential chemical, electronic and optical properties. Strong laser fields …

We explore pump-probe high harmonic generation (HHG) from monolayer hexagonal-boron-
nitride, where a terahertz pump excites coherent optical phonons that are subsequently …

The advent of chirped-pulse amplification in the 1980s and femtosecond Ti: sapphire lasers
in the 1990s enabled transformative advances in intense laser–matter interaction physics …

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 …

We carried out a joint theoretical and experimental study of the polarization of high-order
harmonics generated from ZnO by intense, linearly-polarized, infrared laser pulses …

The real-space picture of electron recollision with the parent ion guides our understanding of
the highly nonlinear response of atoms and molecules to intense low-frequency laser fields …

In this study, we theoretically investigate the strain effect on the orientation-dependent high-
order harmonic generation (HHG) of monolayer aluminum nitride (AlN) by solving the …