Electron-beam instability in left-handed media.

  title={Electron-beam instability in left-handed media.},
  author={Y. P. Bliokh and Sergey E Savel'ev and Franco Nori},
  journal={Physical review letters},
  volume={100 24},
We predict that two electron beams can develop an instability when passing through a slab of left-handed media (LHM). This instability, which is inherent only for LHM, originates from the backward Cherenkov radiation and results in a self-modulation of the beams and radiation of electromagnetic waves. These waves leave the sample via the rear surface of the slab (the beam injection plane) and form two shifted bright circles centered at the beams. A simulated spectrum of radiation has well… 

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