19.2-attosecond X-ray pulse lets scientists freeze electron motion
Electrons just got caught in the act. For decades, scientists have known that electrons quietly dictate almost everything,…
Quantum interference and occupation control in high harmonic generation from monolayer WS2
Transition from perturbative to strong-field driven HHG in monolayer WS2 Figure 1a schematically illustrates the electronic processes in monolayer…
Plasma lens for focusing attosecond pulses
Bor, Z. Distortion of femtosecond laser pulses in lenses and lens systems. J. Mod. Opt. 35, 1907–1918 (1988).…
Transient domain boundary drives ultrafast magnetisation reversal
Time-resolved magnetic soft-X-ray spectroscopy We investigate a typical nanometre-scale heterostructure consisting of an amorphous ferrimagnetic Gd25Co75 alloy with…
Noncollinear harmonic spectroscopy reveals crossover of strong-field effects
Figure 1a illustrates the generation of ultrahigh order wave-mixing photons resulting from the superposition of an intense fundamental field…