Analogue of Vavilov–Cherenkov radiation in a medium based on an array of noninteracting nanotubes

We consider the mechanism for generating radiation whose source surface currents are modulated in the variable $z-vt$ in an array of noninteracting nanotubes. The velocity $v$ must be equal to or larger than the light velocity in the medium. The process is qualitatively analogous to Vavilov–Cherenkov radiation. We show that intense SHF and THz radiation can be generated using such a method.