E. Eckner

TL;DR: Observations reveal that the absolute efficiency of the harmonics declines for the steepest plasma density scale length L(p)→0, thus demonstrating that near-steplike density gradients can be achieved for interactions using high-contrast high-intensity laser pulses.

TL;DR: With the presented setup, relativistic surface high-harmonic generation becomes a powerful source of coherent XUV pulses that might enable applications in, e.g. attosecond laser physics and the seeding of free-electron lasers, when the laser issues causing 80-% pulse energy fluctuations are overcome.

TL;DR: In this article, it was shown that multiple initial configurations can result in identical momenta for a polyatomic molecule breaking into three or more parts, which significantly complicates the determination of molecular alignment at the time of breakup.

TL;DR: In this article, the enhancement of individual harmonics generated at a relativistic ultra-steep plasma vacuum interface is described by the reflection of the incident laser pulse at a reliscivistic mirror oscillating at the fundamental and the plasma frequency of the bulk plasma.

TL;DR: In this article, the authors demonstrate that individual strong harmonics can indeed be generated by reflecting light off a plasma surface that oscillates at XUV frequencies, by using nonlinear frequency mixing of near-infrared light and a laser-driven plasma oscillation in the extreme ultra-violet mediated by a relativistic nonlinearity.