Heidelberg 2015 – scientific programme
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A: Fachverband Atomphysik
A 20: Interaction with strong or short laser pulses II
A 20.4: Talk
Wednesday, March 25, 2015, 12:00–12:15, C/HSW
Quantum Optimal Control of Photoelectron Spectra. — Esteban Goetz1, Antonia Karamatskou2, Robin Santra2, and •Christiane Koch1 — 1Theoretische Physik, Kassel Universität, Kassel, Deutschland — 2Center for Free-Electron Laser Science, Hamburg, Deutschland
Photoelectron spectra obtained in photoionization reveal information on charge transfert or hole coherence in the parent ion. Optimal control can be used to enhance certain desired features in the photoelectron spectrum. To this end, we combine Krotov's optimal control algorithm[1], time-dependent configuration-interaction singles formalism and the time-splitting method [2] for the calculation and optimization of photoelectron spectra.
The optimization target can be formulated to include specific desired properties in the angle-resolved photoelectron spectrum (PES) alone, in the energy-resolved PES, or both. As an example, we demonstrate our algorithm to maximize the difference between the number of electrons emitted into the upper hemisphere and the number of electrons emitted into the lower hemisphere for Argon.
[1] D. Reich, M. Ndong, and C.P. Koch, J. Chem. Phys. 136, 104103 (2012). [2] A. Karamatskou, S.Pabst, Yi-Jen Chen, and R. Santra, Phys. Rev. A 89, 033415 (2014).