Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 21: Interaction with Strong or Short Laser Pulses II (joint session A/MO)

A 21.2: Talk

Wednesday, March 13, 2024, 14:45–15:00, HS 1010

Controlling ionization with chirped circularly-polarized laser pulses — •Ulf Saalmann — Max-Planck-Institut für Physik komplexer Systeme, Dresden/Germany

We show that controlling two-photon ionization with a chirp, originally predicted for linearly-polarized pulses [X], applies to circular polarization as well. In this case the underlying mechanism is particular transparent in the rotating frame. Experimental demonstration of this mechanism for the Helium atom has been achieved at fermi by the Freiburg group and is presented elsewhere.

[X] Saalmann & Giri & Rost, Phys. Rev. Lett. 121 (2018) 153203.

Keywords: two-photon ionization; coherent control; rapid adiabatic passage; free-electron laser