High Harmonic Generation with Twisted Electrons
arXiv:1909.00728 · doi:10.1103/PhysRevA.100.043408
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 wavepackets continuum-bound transitions are subject to dipole selection rules. For non-central collisions a crossover from circularly to linearly polarized emission occurs for increasing impact parameter, due to the transverse topology of twisted wavepackets.
arXiv comment8 pages, 9 figures
References in corpus (9)
- Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
- Generation of phase-matched circularly-polarized extreme ultraviolet high harmonics for magnetic circular dichroism spectroscopy
- Theory and applications of free-electron vortex states
- Semiclassical Dynamics of Electron Wave Packet States with Phase Vortices
- Attosecond XUV vortices from high-order harmonic generation
- A practical scheme for generating isolated elliptically polarized attosecond pulses using bi-chromatic counter rotating circularly polarized laser fields
- Irregular orbits generate higher harmonics
- Relativistic electron wave packets carrying angular momentum
- Semiclassical description of multiphoton processes