Coupled-resonator optical waveguide: a proposal and analysis

Coupled-resonator optical waveguide: a proposal and analysis

June 1, 1999 / Vol. 24, No. 11 | Amnon Yariv, Yong Xu, Reginald K. Lee, and Axel Scherer
The authors propose a novel type of optical waveguide called the Coupled-Resonator Optical Waveguide (CROW), which consists of a sequence of coupled high-Q resonators. Unlike traditional waveguides that rely on total internal reflection or Bragg reflection, CROWs achieve waveguiding through weak coupling between localized high-Q optical cavities. Using a formalism similar to the tight-binding method in solid-state physics, they derive the dispersion and group velocity relations for the CROWs, showing that these properties are solely characterized by the coupling factor \(\kappa_1\). The study also highlights the potential for highly efficient nonlinear optical frequency conversion and perfect transmission through bends in CROWs, making it a promising candidate for advanced optical applications.The authors propose a novel type of optical waveguide called the Coupled-Resonator Optical Waveguide (CROW), which consists of a sequence of coupled high-Q resonators. Unlike traditional waveguides that rely on total internal reflection or Bragg reflection, CROWs achieve waveguiding through weak coupling between localized high-Q optical cavities. Using a formalism similar to the tight-binding method in solid-state physics, they derive the dispersion and group velocity relations for the CROWs, showing that these properties are solely characterized by the coupling factor \(\kappa_1\). The study also highlights the potential for highly efficient nonlinear optical frequency conversion and perfect transmission through bends in CROWs, making it a promising candidate for advanced optical applications.
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