Magnetic properties of twisted plasmons

Abstract

We consider the linear and nonlinear properties of twisted plasmons propagating in a magnetized plasma. Twisted plasmons are electron plasma waves with a finite amount of angular momentum. In contrast with plane plasma waves, which propagate along the static magnetic field direction with the same dispersion as in isotropic plasmas, the properties of twisted waves depend on the value of their angular momentum. A new dispersion relation is derived, using the fluid approximation. We also study nonlinear effects associated with twisted plasmons, and show that they introduce electromagnetic corrections. Of particular relevance is the excitation of a quasi-static magnetic field, which is associated with finite amplitude plasmon solutions.

Keywords

• Plasmons
• Twisted waves
• Nonlinear waves