Ultrafast charge transport in strongly biased semiconductors is at the heart of high-speed
electronics, electro-optics and fundamental solid-state physics,,,,,,,,,,,,. Intense light pulses in …

Highly-efficient optical generation of narrowband terahertz radiation enables unexplored
technologies and sciences from compact electron acceleration to charge manipulation in …

Strong-field-driven electric currents in condensed-matter systems are opening new frontiers
in petahertz electronics. In this regime, new challenges are arising as the roles of band …

Frequency mixing an ultrafast-pulse laser's fundamental and second-harmonic fields in
semiconductors 1, 2, atomic gases 3, 4, and on metal surfaces 5 generates a directional …

Strong optical pulses at mid-infrared and terahertz frequencies have recently emerged as
powerful tools to manipulate and control the solid state and especially complex condensed …

The nonlinear interaction of subcycle electromagnetic radiation with matter is the current
frontier in ultrafast nonlinear optics and high-field physics. Here, we investigate nonlinear …

The excitation of semiconductors with short, off‐resonant, high‐power terahertz pulses
yields extremely nonlinear, ultrafast, dynamical processes including very‐high harmonic …

We demonstrate terahertz pulses with field amplitudes exceeding 0.2 V/Å generated by
coherent transition radiation. Femtosecond, relativistic electron bunches generated at the …

An experiment-theory comparison is presented to demonstrate terahertz-induced extreme-
nonlinear transients in a GaAs/AlGaAs quantum-well system. The terahertz-pump and …

The active control of matter by strong electromagnetic fields is of growing importance, with
applications all across the optical spectrum from the extreme-ultraviolet to the far-infrared. In …