Terahertz (THz) light has proven to be a fine tool to probe and control quasi-particles and
collective excitations in solids, to drive phase transitions and associated changes in material …

Research at modern light sources continues to improve our knowledge of the natural world,
from the subtle workings of life to matter under extreme conditions. Free-electron lasers, for …

Plasma accelerators can generate ultra-high-brightness electron beams that open the door
to light sources with a smaller physical footprint and properties un-achievable with …

An all-optical method to retrieve the temporal intensity profile of an extreme ultraviolet (XUV)
attosecond pulse is proposed based on XUV-assisted high-order harmonic generation …

Experiments using a THz pump and an X-ray probe at an X-ray free-electron laser (XFEL)
facility like the Linac Coherent Light Source II (LCLS II) require frequency-tunable (3 to 20 …

Time-resolved investigation of electron dynamics relies on the generation of isolated
attosecond pulses in the (soft) X-ray regime. Thomson scattering is a source of high energy …

Ultrashort electron bunches are useful for applications like ultrafast imaging, coherent
radiation production, and the design of compact electron accelerators. Currently, however …

The generation of single-cycle attosecond pulses based on Thomson scattering of terahertz
(THz) pulses is proposed. In the scheme, a high-quality relativistic electron beam, produced …

Conventionally, attosecond pulses are obtained using generation of high-order optical
harmonics upon excitation of various media by femtosecond laser pulses with the central …

We investigate the physical mechanism of unipolar half-cycle pulses generation in resonant
two-level media with inversion symmetry. The unipolar half-cycle pulse contains substantial …