Abstract
Waveguides that are composed of electromagnetically coupled optical microcavities [coupled resonator optical
waveguides (CROWs)] can be used for light guiding, slowing, and storage. In this paper, we present a 2-D analysis of
finite-size straight and curved CROW sections based on a rigorous Muller boundary integral equation method. We study
the mechanisms of the coupling of whispering-gallery (WG) mode and guiding light around bends in CROWs composed of
both identical and size-mismatched microdisk resonators. Our accurate analysis reveals the differences in WG modes
coupling in the vicinity of bends in CROWs composed of optically large and wavelength-scale microcavities. We
propose and discuss possible ways to design low-loss CROW bends and to reduce bend losses. These include selecting
specific bend angles depending on the azimuthal order of the WG mode and tuning the radius of the microdisk
positioned at the CROW bend.
© 2007 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription