Spin-to-orbital angular momentum conversion and spin-polarization filtering in electron beams.

@article{Karimi2012SpintoorbitalAM,
  title={Spin-to-orbital angular momentum conversion and spin-polarization filtering in electron beams.},
  author={Ebrahim Karimi and Lorenzo Marrucci and Vincenzo Grillo and Enrico Santamato},
  journal={Physical review letters},
  year={2012},
  volume={108 4},
  pages={044801}
}
We propose the design of a space-variant Wien filter for electron beams that induces a spin half-turn and converts the corresponding spin angular momentum variation into orbital angular momentum of the beam itself by exploiting a geometrical phase arising in the spin manipulation. When applied to a spatially coherent input spin-polarized electron beam, such a device can generate an electron vortex beam, carrying orbital angular momentum. When applied to an unpolarized input beam, the proposed… CONTINUE READING
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