title: Analysis of coupling between two slab waveguides in the presence of ring resonators.
abstract: The coupling phenomena between two slab waveguides in the presence of ring resonators are investigated through a rigorous integral equation analysis. A Green's-function-theory approach is utilized to develop the integral equation formulation. The solution is obtained by applying an entire-domain Galerkin technique, using the orthogonality properties of involved wave functions in the ring resonators. The field's transmission and reflection coefficients are accurately computed and a practical directional-coupler approach is discussed. The presented results reveal strong resonant coupling phenomena between the two waveguides and the resonators.
authors.affiliation: Microwave and Fiber Optics Laboratory, Department of Electrical and Computer Engineering, National Technical University of Athens, Iroon Polytechniou 9, Zografos 15773, Athens, Greece.
authors.forename: Ioannis D
authors.initials: ID
authors.lastname: Chremmos
authors.forename: Nikolaos K
authors.initials: NK
authors.lastname: Uzunoglu