Non-adiabatic Strong Field Ionization of Atomic Hydrogen
- Resource Type
- Working Paper
- Authors
- Trabert, Daniel; Anders, Nils; Brennecke, Simon; Schöffler, Markus S.; Jahnke, Till; Schmidt, Lothar Ph. H.; Kunitski, Maksim; Lein, Manfred; Dörner, Reinhard; Eckart, Sebastian
- Source
- Phys. Rev. Lett. 127, 273201 (2021)
- Subject
- Physics - Atomic Physics
- Language
We present experimental data on the non-adiabatic strong field ionization of atomic hydrogen using elliptically polarized femtosecond laser pulses at a central wavelength of 390 nm. Our measured results are in very good agreement with a numerical solution of the time-dependent Schr\"odinger equation (TDSE). Experiment and TDSE show four above-threshold ionization (ATI) peaks in the electron's energy spectrum. The most probable emission angle (also known as 'attoclock-offset angle' or 'streaking angle') is found to increase with energy, a trend that is opposite to standard predictions based on Coulomb interaction with the ion. We show that this increase of deflection-angle can be explained by a model that includes non-adiabatic corrections of the initial momentum distribution at the tunnel exit and non-adiabatic corrections of the tunnel exit position itself.
Comment: 8 pages, 5 figures