Manipulation of Multiple Fano Resonances Based on a Novel Chip-Scale MDM Structure

A novel chip-scale metal-dielectric-metal (MDM) refractive-index sensor is proposed and investigated in this paper by using finite-difference time-domain (FDTD) method and multimode interference coupled-mode theory (MICMT), respectively. A slot cavity with an embedded tooth-shape cavity and a side-c...

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Published in:IEEE access 2020, Vol.8, p.32914-32921
Main Authors: Li, Zhengfeng, Wen, Kunhua, Chen, Li, Lei, Liang, Zhou, Jinyun, Zhou, Dongyue, Fang, Yihong, Qin, Yuwen
Format: Article
Language:English
Subjects:
Coupled modes
Couplings
Fano resonance
Finite difference methods
Finite difference time domain method
Interference
metal-dielectric-metal waveguide
Optical resonators
Optical waveguides
plasmonic
refractive index sensing
Resonators
slow light
Time domain analysis
Waveguides
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cited_by cdi_FETCH-LOGICAL-c408t-e3936d4c64f6d4dc5058c319f45148ebfd60d8ed033669eba6d5026f92961fc03
cites cdi_FETCH-LOGICAL-c408t-e3936d4c64f6d4dc5058c319f45148ebfd60d8ed033669eba6d5026f92961fc03
container_end_page 32921
container_issue
container_start_page 32914
container_title IEEE access
container_volume 8
creator Li, Zhengfeng
Wen, Kunhua
Chen, Li
Lei, Liang
Zhou, Jinyun
Zhou, Dongyue
Fang, Yihong
Qin, Yuwen
description A novel chip-scale metal-dielectric-metal (MDM) refractive-index sensor is proposed and investigated in this paper by using finite-difference time-domain (FDTD) method and multimode interference coupled-mode theory (MICMT), respectively. A slot cavity with an embedded tooth-shape cavity and a side-coupled semi-ring cavity are inserted between the input and output MDM waveguides. According to the simulation results, dual ultra-sharp and asymmetrical Fano peaks emerge in transmission spectrum with high performances. Besides, the transmission responses for the primary parameters of this structure are also investigated. To focus on developing integrated photonic devices, the original structure is successfully expanded by two additional semi-ring cavities through an innovative coupling approach, generating up to eight Fano peaks with outstanding characteristics. It is believed that this novel MDM structure will be a guideline for designing the chip-scale plasmonic devices.
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source IEEE Open Access Journals
subjects Coupled modes
Couplings
Fano resonance
Finite difference methods
Finite difference time domain method
Interference
metal-dielectric-metal waveguide
Optical resonators
Optical waveguides
plasmonic
refractive index sensing
Resonators
slow light
Time domain analysis
Waveguides
title Manipulation of Multiple Fano Resonances Based on a Novel Chip-Scale MDM Structure
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