Interference of guiding modes in “traffic” circle waveguides composed of dielectric spherical particles

• Published in: Physics letters. A 2009-03, Vol.373 (15), p.1396-1400
• Main Authors: Polishchuk, I.Ya, Gozman, M.I., Samoylova, O.M., Burin, A.L.
• Format: Article
• Language: English
• ISSN: 0375-9601; 1873-2429
• DOI: 10.1016/j.physleta.2008.12.071

The interference of guiding polariton modes propagating through the waveguide composed of dielectric spherical particles forming a “traffic” circle docked by two linear entrance and exit chains is investigated. The dependence of intensity of the polariton wave on the position of the particle on the circle was studied using the multisphere Mie scattering formalism. We show that, if the frequency of light belongs to the pass-band of the circular part of this waveguide, the electromagnetic waves may be considered as two optical beams running along the 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 along the circle in opposite directions. The applications of this interference are discussed.