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Abstract <p>A study is carried out of the mechanism of generation of Cherenkov superradiance by modulated alternating surface currents in an array of elongated nanotubes forming a three-dimensional structure. The propagation velocity for the envelope of currents in nanotubes is higher than the speed of light in a coaxial waveguide medium. The surface currents are generated using powerful short electric pulses (<i>z</i> – <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({v}t\)</EquationSource> <!--NuclPhys2509061Sadykov-m1--> </InlineEquation>) in the coaxial waveguide. The effective permittivity inside the coaxial waveguide is determined based on the Maxwell Garnett model with a correction of the Clausius–Mossotti approximation.</p>

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Generation of Microwave Radiation in a Coaxial Cylindrical Waveguide Based on an Array of Elongated Nanotubes Forming a Three-Dimensional Structure

  • 期刊论文

  • 发表日期：

    2025年12月21日

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  • N. R. Sadykov,
  • I. E. Shakirov

摘要

Abstract

A study is carried out of the mechanism of generation of Cherenkov superradiance by modulated alternating surface currents in an array of elongated nanotubes forming a three-dimensional structure. The propagation velocity for the envelope of currents in nanotubes is higher than the speed of light in a coaxial waveguide medium. The surface currents are generated using powerful short electric pulses (z – \({v}t\) ) in the coaxial waveguide. The effective permittivity inside the coaxial waveguide is determined based on the Maxwell Garnett model with a correction of the Clausius–Mossotti approximation.