Interference of guiding polariton mode in "traffic" circle waveguides composed of dielectric spherical particles

TL;DR

This paper investigates how polariton guiding modes interfere in 'traffic circle' waveguides made of dielectric spheres, revealing that within passbands, the waves behave as two interfering optical beams traveling in opposite directions.

Contribution

It introduces a formalism to analyze interference effects in dielectric spherical particle waveguides and demonstrates the wave behavior as two counter-propagating beams within passbands.

Findings

Electromagnetic waves in the waveguide can be modeled as two counter-propagating beams.

Interference patterns depend on the particle position and frequency within the passband.

The superposition of two waves explains the observed intensity behavior.

Abstract

The interference of polariton guiding modes propagating through "traffic circle" waveguides composed of dielectric spherical particles is investigated. The dependence of intensity of the wave on the position of the particle was studied using the multisphere the Mie scattering formalism. We show that if the frequency of light belongs to the passband of the waveguide, electromagnetic waves may be considered as two optical beams running along a circle in opposite directions and interfering with each other. Indeed, the obtained intensity behavior can be represented as a simple superposition of two waves propagating around a circle in opposite directions. The applications of this interference are discussed.