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

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 …

Weyl semimetals are topological materials whose electron quasiparticles obey the Weyl
equation. They possess many unusual properties that may lead to new applications. This is …

High-harmonic generation has been driving the development of attosecond science and
sources. More recently, high-harmonic generation in solids has been adopted by other …

High harmonic generation (HHG) has developed in recent years as a promising tool for
ultrafast materials spectroscopy. At the forefront of these advancements, several works …

Petahertz, or lightwave, electronics uses tailored optical waveforms to control charge
carriers in an electronic circuit at petahertz frequencies. This may enable faster processing …

Nonlinear optical materials possess wide applications, ranging from terahertz and mid-
infrared detection to energy harvesting. Recently, the correlations between nonlinear optical …

An ultra-low pump intensity and high photon flux have been long pursuits of high harmonic
generation (HHG) in solids. However, there is lack of a criterion to identify a pristine solid …

As new states of matter currently attracting broad attention in the optics field, topological
insulators (TIs) present topologically‐protected conducting surface states surrounding …

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 …