Anisotropic metamaterial waveguide driven by a cold and relativistic electron beam

作者：Torabi Mahmoud; Shokri Babak^*

来源：Physics of Plasmas, 2018, 25(3): 033110.

DOI：10.1063/1.5018812

We study the interaction of a cold and relativistic electron beam with a cylindrical waveguide loaded by an anisotropic and dispersive metamaterial layer. The general dispersion relation for the transverse magnetic (TM) mode, through the linear fluid model and Maxwell equations decomposition method, is derived. The effects of some metamaterial parameters on dispersion relation are presented. A qualitative discussion shows the possibility of monomodal propagation band widening and obtaining more control on dispersion relation behavior. Especially for epsilon negative near zero metamaterials, these effects are considerable. Finally, the anisotropy and metamaterial layer thickness impacts on wave growth rate for different metamaterials are considered. The results demonstrate that we can control both wave growth rate and voltage of saturation peak by metamaterial parameters. Published by AIP Publishing.

• 出版日期2018-3