We consider the tunneling between two monomode continua through a monomode structure with the symmetry of two orthogonal mirror planes. We derive in closed form the conditions for selective transfer of a single propagating state from one continuum to the other, leaving all other neighbor states unaffected. We illustrate the results of this analysis by analytical solutions for a simple structure made out of one-dimensional photonic waveguides. These theoretical results are confirmed by experiments using coaxial cables.

• Received 25 May 1999

DOI:https://doi.org/10.1103/PhysRevB.60.10628