8 September 2006 Radiative instability of electron beam in carbon nanotubes
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Proceedings Volume 6328, Nanomodeling II; 63280Z (2006) https://doi.org/10.1117/12.678029
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States
Basic mechanisms of the interaction of electron beam tavelling through a carbon nanotube with electromagnetic wave, resulting in the radiative instability and generation of stimulated radiation, are considered. The effect of the surface electromagnetic wave slow-down in CNT (c/v > 100) [Slepyan et al., Phys. Rev. B 60, 17136, 1999] is exploited to synchronize the wave and the beam and thus to realize the Cherenkov radiation mechanism. Alternative mechanism of the electron beam instability is proposed based on the undulator emission arising due to the interband transitions of electrons moving in nanotube. The dispersion equations of the electron beam instability and threshold conditions for the stimulated radiation are derived and studied. The analysis of the threshold conditions estimates the possibility of the stimulated emission by electron beam as realistic and attainable at present-day experimental technique.
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Konstantin G. Batrakov, Polina P. Kuzhir, Sergey A. Maksimenko, "Radiative instability of electron beam in carbon nanotubes", Proc. SPIE 6328, Nanomodeling II, 63280Z (8 September 2006); doi: 10.1117/12.678029; https://doi.org/10.1117/12.678029

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