Radiation and absorption losses of the whispering-gallery-mode dielectric resonators excited by a dielectric waveguide

The scattering of a surface wave of a dielectric layer backed by a ground p lane from the whispering-gallery-mode dielectric resonators is considered b y use of the surface potential approach and analytical regularization, Effi cient numerical algorithms have been developed with applications to the ban dstop tilter design. Transmitted and reflected power fractions and radiatio n and absorption losses are calculated and compared for two alternative fie ld polarizations. The effect of excitation of the higher order modes of the waveguide is also studied.