Theory of gyrotropic ring resonators with counterpropagating modes coupling |
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Authors: | Dirk Jalas Alexander Yu Petrov Manfred Eich |
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Institution: | Institute of Optical and Electronic Materials, Hamburg University of Technology, D-21073 Hamburg, Germany |
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Abstract: | The Faraday effect in ring resonators leads to the resonance splitting of clockwise and counter-clockwise propagating modes. In this work we investigate how this resonance splitting influences the ring resonator's behavior if both modes are coupled by a sidewall corrugation of the resonator. Coupled mode theory is used to evaluate the transmission and reflection characteristics of a ring resonator coupled to a waveguide. Based on these evaluations, we characterize a novel ring resonator switch. The resonance of the corrugated gyrotropic resonator coupled to a waveguide can be switched off by the application of the external magnetic field. In this case, the resonance is not shifted, as what typically occurs at small perturbations, but suppressed. |
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Keywords: | Magneto-optical Non-reciprocal Ring resonator Backscattering |
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