Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Strong laser fields - I (joint session A/MO)

A 23.3: Vortrag

Dienstag, 6. März 2018, 14:45–15:00, K 2.019

Spin polarization and spin filtering of free electrons in bichromatic laser fields — Matthias M. Dellweg and •Carsten Müller — Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf

Coherent electron scattering from intense laser fields of high frequency is studied theoretically. By solving the time-dependent Dirac equation it is shown that the combination of a fundamental laser mode with a counterpropagating second harmonic may act as a spin filter for free electrons, provided the field polarizations are chosen properly [1]. Besides, a spin-polarizing interferometric electron beam splitter is presented which relies on an arrangement of three pairs of counterpropagating laser waves [2]. The proposed laser field configuration is shown to exert the same effect on free electrons as an ordinary Stern-Gerlach magnet does on atoms.

[1] M. M. Dellweg and C. Müller, Phys. Rev. A 95, 042124 (2017)

[2] M. M. Dellweg and C. Müller, Phys. Rev. Lett. 118, 070403 (2017)