Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 16: Interaction with strong or short laser pulses I

A 16.1: Vortrag

Dienstag, 24. März 2015, 14:30–14:45, C/kHS

Stark dynamics revealed by the zero-energy-structure in strong-field photoelectron spectra — •Elias Diesen, Ulf Saalmann, and Jan-Michael Rost — Max-Planck-Institut für Physik komplexer Systeme, Dresden

A pronounced feature ("zero-energy-structure") at the meV scale has been observed [1] in photoionization spectra in the IR, high-intensity tunneling regime. We show that this peak is formed by a general mechanism: the constant electric field in the detector apparatus ionizes Rydberg states created by frustrated tunneling ionization [2]. The detailed structure of the peak is revealed using classical calculations, giving interesting general results on the Stark problem in this unusual regime and showing excellent agreement with experiments.

[1] Dura et al, Sci. Rep. 3, 2675 (2013)

[2] Nubbemeyer et al., Phys. Rev. Lett. 101, 233001 (2008)