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High-order harmonic generation with twisted electrons

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Gemsheim,  Sebastian
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Rost,  Jan M.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Gemsheim, S., & Rost, J. M. (2019). High-order harmonic generation with twisted electrons. Physical Review A, 100(4): 043408. doi:10.1103/PhysRevA.100.043408.


Cite as: https://hdl.handle.net/21.11116/0000-0005-8546-6
Abstract
We present analytically and numerically the spectrum of high harmonic emission generated by twisted electrons in the presence of linearly polarized light. Ensuing transitions from electronic continuum states with orbital angular momentum to bound states give rise to circularly polarized attosecond pulses. For central collisions with twisted wave packets, continuum-bound transitions are subject to dipole selection rules. For noncentral collisions, a crossover from circularly to linearly polarized emission occurs for increasing impact parameter due to the transverse topology of twisted wave packets.