M. Hentschel

TL;DR: The generation of intense, few-cycle laser pulses with a stable carrier envelope phase that permit the triggering and steering of microscopic motion with an ultimate precision limited only by quantum mechanical uncertainty are reported.

TL;DR: It is demonstrated that a laser-based sampling system, consisting of a few-femtosecond visible light pulse and a synchronized sub-feminine soft X-ray pulse, allows us to trace the relaxation dynamics of core-excited atoms directly in the time domain with attosecond resolution.

TL;DR: The authors' techniques for generation and measurement offer sub-femtosecond resolution over a wide range of x-ray wavelengths, paving the way to experimental attosecond science and tracing atomic processes evolving faster than the exciting light field is within reach.

TL;DR: It is demonstrated that if the emitted electron wave packet is temporally confined to a small fraction of the oscillation period of the interacting light wave, its energy spectrum can be up- or downshifted by many times the laser photon energy without substantial broadening.

TL;DR: In this paper, an ultrafast soft-x-ray source was proposed for the first time, which achieved a harmonic conversion efficiency of approximately 10−13 nm in neon and some 2 orders of magnitude higher in argon.