Free‐space super‐strong terahertz (THz) electromagnetic fields offer multifaceted
capabilities for reaching extreme nonlinear THz optics. However, the lack of powerful solid …

Extreme terahertz (THz) science and technologies, the next disruptive frontier in nonlinear
optics, provide multifaceted capabilities for exploring strong light‐matter interactions in a …

Photoionization of matter is one of the fastest electronic processes in nature. Experimental
measurements of photoionization dynamics have become possible through attosecond …

Rich physics emerges as the result of interplay between discrete and continuous quantum
states. A process of reconstruction of attosecond beating by interference of two-photon …

Terahertz (THz) field enhancement has significant applications in high-resolution imaging,
next-generation wireless communications, and networking. In this work, we experimentally …

Recent development of ultrafast measurement techniques on the sub-femtosecond time
scale has enabled us to see the atom–laser interaction in real time. One of the important …

The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth
(∼ 10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts …

Strong-field terahertz (THz) light-matter interaction provides various nonlinear control
approaches in condensed matter physics, energy and material sciences, electron …

In attosecond science it is assumed that Wigner-Smith time delays, known from scattering
theory, are determined by measuring streaking shifts. Despite their wide use from atoms to …

Terahertz (THz) radiation is a powerful tool for exploring various scientific frontiers through
THz pump–probe experiments. However, different experiments may require THz radiation …