Energy currents in the field formed by waves with different frequencies

TL;DR

This paper investigates the behavior of energy currents in fields formed by superimposed waves of different frequencies, combining simulations and experiments to reveal particle rotation effects.

Contribution

It provides new insights into the energy flow and particle dynamics in polychromatic wave fields, highlighting the impact of frequency superposition on orbital momentum.

Findings

Particle rotation is driven by orbital momentum.

Polychromatic radiation increases particle rotation speed.

Superposition of vortices with different charges affects energy currents.

Abstract

The behavior of instantaneous and averaged vectors of the Poynting vector transverse component for the resulting field formed as a superposition of waves with different frequencies and different polarizations is considered. Results of computer simulation and experimental data are obtained for the superposition of frequently differed vortices with different and the same signs of topological charges. It is shown that the captured particle rotates due to the orbital momentum and substantial increase of particle rotation speed in the case of polychromatic radiation as opposed to monochromatic is observed.