Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Interaction with strong and short laser pulses

A 33.9: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik

Time delay effects in strong field ionization — •Daniel Bakucz Canário, Michael Klaiber, Karen Z. Hatsagortsyan, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117, Heidelberg, Germany

The problem of the electron time delay in the tunnel ionization in strong laser fields has received renewed attention following recent experimental results confirming a non-zero time delay[1]. We investigate aspects of time delay in strong fields by using the strong field approximation for a zero-range potential to calculate the time delay (with respect to the laser field peak) of an ionized electron wavepacket and comparing this to the time delay of a Wigner trajectory for a quasi-static barrier as well as a classically evolved trajectory. Our aim is twofold: to show how the time delay and momentum shift of an ionized electron at the tunnel exit counterbalance[2], creating the asymptotically measurable time delay, and secondly, to find a physical interpretation for the emergence of this asymptotic time delay.

[1] N. Camus, E. Yakaboylu, et al, Phys. Rev. Lett. 119:023201, Jul 2017.

[2] M. Klaiber, et al, Phys. Rev. Lett. 120:013201 Jan 2018.