Davidovich M. V. 1
1Saratov State University, Saratov, Russia
Email: davidovichmv@info.sgu.ru
The dispersion of magnetoplasmons propagating along the surface of a metamaterial with periodic well-conducting semiconductor or metallic inclusions under the application of a strong external magnetic field along the propagation direction is considered. The tensor of the effective dielectric constant of a metamaterial in the presence of a field is found on the basis of the effective medium method. It is shown that in the THz range there are delayed magnetoplasmons with low losses, i. e. such a structure with a flat surface behaves like a decelerating system and can be used in an TWT with magnetic induction of the order of 1Tl, which is necessary for focusing a ribbon electron beam. The magnetic field effectively controls the dispersion. Keywords: magnetoplasmon, THz TWT, dispersion, hyperbolic metamaterial, homogenization, dispersion equations.
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