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arXiv · 2507.06703

Optimizing the incident electron momentum for resonant few-photon Kapitza-Dirac scattering in bichromatic laser fields

Ingo Elsner·Carsten Müller
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Abstract

Nonrelativistic Kapitza-Dirac scattering of electrons from counterpropagating bichromatic laser waves is studied in the resonant Bragg regime, taking the electron spin into account. We show that the intrinsic field-induced detuning, which arises in the Rabi oscillation dynamics between initial and scattering state of the electron, can be compensated by a suitable adjustment of its incident momentum. Analytical formulas of the optimized electron momentum for spin-dependent three-photon and spin-independent four-photon Kapitza-Dirac scattering are obtained from simplified model systems in reduced dimensionality, which preserve the characteristic properties of the process.

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Ingo Elsner, Carsten Müller. 2025-07-09. Optimizing the incident electron momentum for resonant few-photon Kapitza-Dirac scattering in bichromatic laser fields. https://arxiv.org/abs/2507.06703

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