Applied Physics Letters · 2008 · 29 citations · 12 references
EngineeringElectrical EngineeringMaterials ScienceMicroelectronicsPhotonicsSemiconductor DevicesCoupled CircuitsHigh-frequency Semiconductor DevicesIntegrated Circuit DesignOptical ResonatorsResonant CircuitsSilicon PhotonicsCavity ResonatorsCoupled Resonant CircuitsCoupling CoefficientResonant CouplingResonator CouplingRing ResonatorsSilicon-on-insulator ProcessingSilicon-on-insulator Technology
We demonstrate experimentally the finesse enhancement in a pair of mutually coupled ring resonators coupled to two buses fabricated in silicon-on-insulator technology, as proposed theoretically in an earlier paper. A finesse close to 100 (or Q=30000) is obtained in a two-ring system, with the outer ring double the size of the inner ring, and an external coupling coefficient of 34%. The maximum finesse enhancement relative to the single-ring structure is 14 times, in good agreement with the theoretical prediction.
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