Electromagnetic field generated by a charge moving along a helical orbit inside a dielectric cylinder

TL;DR

This paper derives expressions for the electromagnetic fields generated by a charge moving helically inside a dielectric cylinder, analyzing the radiation characteristics and intensity of the emitted electromagnetic waves.

Contribution

It provides new analytical formulas for electromagnetic potentials and fields inside a dielectric cylinder with a helical charge motion, focusing on radiation modes.

Findings

Radiation field components are explicitly separated from total fields.

The radiation intensity for the lowest azimuthal mode is characterized.

Analytical expressions enable better understanding of electromagnetic radiation in cylindrical dielectric structures.

Abstract

The electromagnetic field generated by a charged particle moving along a helical orbit inside a dielectric cylinder immersed into a homogeneous medium is investigated. Expressions are derived for the electromagnetic potentials, electric and magnetic fields in the region inside the cylinder. The parts corresponding to the radiation field are separated. The radiation intensity on the lowest azimuthal mode is studied.