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Interaction of Relativistic Electron-Vortex Beams with Few-Cycle Laser Pulses

MPG-Autoren
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Aiello,  Andrea
Optical Quantum Information Theory, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Zitation

Hayrapetyan, A. G., Matula, O., Aiello, A., Surzhykov, A., & Fritzsche, S. (2014). Interaction of Relativistic Electron-Vortex Beams with Few-Cycle Laser Pulses. PHYSICAL REVIEW LETTERS, 112(13): 134801. doi:10.1103/PhysRevLett.112.134801.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002D-660F-4
Zusammenfassung
We study the interaction of relativistic electron-vortex beams (EVBs) with laser light. Exact analytical solutions for this problem are obtained by employing the Dirac-Volkov wave functions to describe the (monoenergetic) distribution of the electrons in vortex beams with well-defined orbital angular momentum. Our new solutions explicitly show that the orbital angular momentum components of the laser field couple to the total angular momentum of the electrons. When the field is switched off, it is shown that the laser-driven EVB coincides with the field-free EVB as reported by Bliokh et al. [Phys. Rev. Lett. 107, 174802 (2011)]. Moreover, we calculate the probability density for finding an electron in the beam profile and demonstrate that the center of the beam is shifted with respect to the center of the field-free EVB.