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Type: | Artigo |
Title: | Modeling Quasi-dark States With Temporal Coupled-mode Theory Modeling quasi-dark states with temporal coupled-mode theory |
Author: | Souza, M. C. M. M Rezende, G. F. M. Barea, L. A. M. Wiederhecker, G. S. Frateschi, N. C. |
Abstract: | Coupled resonators are commonly used to achieve tailored spectral responses and allow novel functionalities in a broad range of applications. The Temporal Coupled-Mode Theory (TCMT) provides a simple and general tool that is widely used to model these devices. Relying on TCMT to model coupled resonators might however be misleading in some circumstances due to the lumped-element nature of the model. In this article, we report an important limitation of TCMT related to the prediction of dark states. Studying a coupled system composed of three microring resonators, we demonstrate that TCMT predicts the existence of a dark state that is in disagreement with experimental observations and with the more general results obtained with the Transfer Matrix Method (TMM) and the Finite-Difference Time-Domain (FDTD) simulations. We identify the limitation in the TCMT model to be related to the mechanism of excitation/decay of the supermodes and we propose a correction that effectively reconciles the model with expected results. Our discussion based on coupled microring resonators can be useful for other electromagnetic resonant systems due to the generality and far-reach of the TCMT formalism. (C) 2016 Optical Society of America Coupled resonators are commonly used to achieve tailored spectral responses and allow novel functionalities in a broad range of applications. The Temporal Coupled-Mode Theory (TCMT) provides a simple and general tool that is widely used to model these devices. Relying on TCMT to model coupled resonators might however be misleading in some circumstances due to the lumped-element nature of the model. In this article, we report an important limitation of TCMT related to the prediction of dark states. Studying a coupled system composed of three microring resonators, we demonstrate that TCMT predicts the existence of a dark state that is in disagreement with experimental observations and with the more general results obtained with the Transfer Matrix Method (TMM) and the Finite-Difference Time-Domain (FDTD) simulations. We identify the limitation in the TCMT model to be related to the mechanism of excitation/decay of the supermodes and we propose a correction that effectively reconciles the model with expected results. Our discussion based on coupled microring resonators can be useful for other electromagnetic resonant systems due to the generality and far-reach of the TCMT formalism. |
Subject: | Dual-ring Modulator Microring Resonators Enhancement Dynamics Filters Driven Ressonadores, Guias de ondas, Cavities |
Country: | Estados Unidos |
Editor: | Optical Society of America |
Citation: | Optics Express. Optical Soc Amer, v. 24, p. 18960 - 18972, 2016. |
Rights: | aberto |
Identifier DOI: | 10.1364/OE.24.018960 |
Address: | https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-17-18960 |
Date Issue: | 2016 |
Appears in Collections: | IFGW - Artigos e Outros Documentos |
Files in This Item:
File | Size | Format | |
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000385227100012.pdf | 6.48 MB | Adobe PDF | View/Open |
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