The study of propagation characteristics of millimeter-wave vortex in magnetized plasma by using FDTD Method

TL;DR

This paper investigates how millimeter-wave vortex modes propagate in magnetized plasma using FDTD simulations, revealing potential for plasma heating and analyzing hybrid mode vortex stability in waveguides.

Contribution

It introduces a detailed FDTD simulation study of millimeter-wave vortex propagation in magnetized plasma, focusing on hybrid modes in cylindrical corrugated waveguides.

Findings

Millimeter-wave vortex can propagate in magnetized plasma even in cut-off conditions.

Hybrid mode vortex in cylindrical waveguides exhibits stable propagation characteristics.

Potential application in efficient plasma heating techniques.

Abstract

It is pointed out that millimeter-wave vortex may contribute an efficient plasma heating since it was found that the millimeter-wave vortex can propagate in magnetized plasma even in which the normal plane wave is in cut-off condition. Then, it was assumed that the vortex field was the Laguerre-Gaussian (L-G) mode which is free-space solution, but the generation and stable propagation of the L-G mode vortex are not easy in the millimeter frequency range. On the other hand, it is known that millimeter-wave hybrid mode of cylindrical corrugated waveguide has also vortex property. In this paper, we investigate propagation characteristics of millimeter-wave vortex of a hybrid mode of cylindrical corrugated waveguide in the magnetized plasma by using three dimensional numerical simulations with finite-difference time-domain (FDTD) method.