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Enhanced coupled-resonator-induced transparency and optical fano resonance via intracavity backscattering

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Enhanced coupled-resonator-induced transparency and optical fano resonance via intracavity backscattering

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Title: Enhanced coupled-resonator-induced transparency and optical fano resonance via intracavity backscattering
Author: Ang, Thomas Y. L.; Ngo, Nam Quoc
Copyright year: 2012
Abstract: We look into the use of the intracavity backscattering in twin-coupled traveling wave microresonators (TWMRs) to generate enhanced coupled-resonator-induced transparency (CRIT) and optical Fano resonance (OFR). Intracavity backscattering makes it possible to either generate a single CRIT peak or a pair of CRIT peaks within one free spectral range in the transmission spectrum. The distance between the twin-CRIT peaks can be tuned by controlling the intracavity backscattering strength. Also, the use of intracavity backscattering allows the simultaneous production of both fast and slow light effects. In addition, it is found that the symmetric CRIT peaks can be reshaped into asymmetric OFR line shapes either by using TWMRs with different intracavity backscattering strengths when one input is launched into the circuit or by modulating the phase/amplitude difference between the dual contrapropagating inputs, which are launched into the circuit in the presence of intracavity backscattering. These allow switching between CRIT and OFR to be realized in the absence of gain or phase tuning elements in the cavities, unlike conventional twin-coupled TWMR systems.
Subject: DRNTU::Engineering.
Type: Journal Article
Series/ Journal Title: Journal of the optical society of America B
School: School of Electrical and Electronic Engineering
Research Centre: Photonics Research Centre
Rights: © 2012 Optical Society of America. This paper was published in Journal of the Optical Society of America B and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following DOI: [http://dx.doi.org/10.1364/JOSAB.29.001094].  One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Version: Published version

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