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Electron-beam instability in left-handed media

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journal contribution
posted on 10.07.2013, 09:19 by Yury P. Bliokh, Sergey Saveliev, Franco Nori
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-separated lines on top of a broad continuous spectrum, which indicates dynamical chaos in the system. The radiation intensity and its spectrum can be controlled either by the beams’ current or by the distance between the two beams.

History

School

  • Science

Department

  • Physics

Citation

BLIOKH, Y.P., SAVEL'EV, S. and FRANCO, N., 2008. Electron-beam instability in left-handed media. Physical Review Letters, 100 (24), 244803, 4pp.

Publisher

© American Physical Society

Version

VoR (Version of Record)

Publication date

2008

Notes

This article was published in the journal, Physical Review Letters [© American Physical Society].

ISSN

0031-9007

Language

en

Exports

Loughborough Publications

Keywords

Exports