Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling

Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling

We propose and numerically investigate a novel asymmetric capsule-shaped metallic cavity (ACMC) structure for unidirectional waveguide coupling. By introducing cylindrical facets at cavity ends with different radius, asymmetric resonant mode is confined inside the cavity so that the evanescent energ...

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Main Authors: Baifu Zhang, Haifeng Hu, Hao Wang, Cheng Han, Zhe Shen, Ji Xu, Ming Sun, Li Li
Format: Article
Language:English
Published: IEEE 2020-01-01
Series:IEEE Photonics Journal
Subjects:
Semiconductor lasers
Waveguides
Plasmonics
Online Access:https://ieeexplore.ieee.org/document/9239875/
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spelling doaj-1dc896ff93364ea1afc48a307f65d88c2021-05-19T23:00:16ZengIEEEIEEE Photonics Journal1943-06552020-01-011261810.1109/JPHOT.2020.30335489239875Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide CouplingBaifu Zhang0https://orcid.org/0000-0002-9634-6086Haifeng Hu1Hao Wang2Cheng Han3Zhe Shen4https://orcid.org/0000-0003-3370-8913Ji Xu5Ming Sun6Li Li7https://orcid.org/0000-0003-0913-2395School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaCollege of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaSchool of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, ChinaWe propose and numerically investigate a novel asymmetric capsule-shaped metallic cavity (ACMC) structure for unidirectional waveguide coupling. By introducing cylindrical facets at cavity ends with different radius, asymmetric resonant mode is confined inside the cavity so that the evanescent energy can be unevenly coupled into the two directions of the waveguide underneath the cavity. We conduct three-dimensional finite-difference time-domain simulations and demonstrate the effectiveness of the proposed ACMC-based unidirectional waveguide coupling. Besides, by modifying suitable geometry of the proposed structure, the extinction ratio and coupling efficiencies of both directions of the waveguide can be flexibly designed, resulting in unequal coupling of optical energy. In addition, the dependence of the waveguide-coupling properties on ACMC geometry is also numerically investigated in this paper.https://ieeexplore.ieee.org/document/9239875/Semiconductor lasersWaveguidesPlasmonics
collection DOAJ
language English
format Article
sources DOAJ
author Baifu Zhang
Haifeng Hu
Hao Wang
Cheng Han
Zhe Shen
Ji Xu
Ming Sun
Li Li
spellingShingle Baifu Zhang
Haifeng Hu
Hao Wang
Cheng Han
Zhe Shen
Ji Xu
Ming Sun
Li Li
Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling
IEEE Photonics Journal
Semiconductor lasers
Waveguides
Plasmonics
author_facet Baifu Zhang
Haifeng Hu
Hao Wang
Cheng Han
Zhe Shen
Ji Xu
Ming Sun
Li Li
author_sort Baifu Zhang
title Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling
title_short Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling
title_full Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling
title_fullStr Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling
title_full_unstemmed Design and Analysis of Asymmetric Capsule-Shaped Metallic Cavities for Unidirectional Waveguide Coupling
title_sort design and analysis of asymmetric capsule-shaped metallic cavities for unidirectional waveguide coupling
publisher IEEE
series IEEE Photonics Journal
issn 1943-0655
publishDate 2020-01-01
description We propose and numerically investigate a novel asymmetric capsule-shaped metallic cavity (ACMC) structure for unidirectional waveguide coupling. By introducing cylindrical facets at cavity ends with different radius, asymmetric resonant mode is confined inside the cavity so that the evanescent energy can be unevenly coupled into the two directions of the waveguide underneath the cavity. We conduct three-dimensional finite-difference time-domain simulations and demonstrate the effectiveness of the proposed ACMC-based unidirectional waveguide coupling. Besides, by modifying suitable geometry of the proposed structure, the extinction ratio and coupling efficiencies of both directions of the waveguide can be flexibly designed, resulting in unequal coupling of optical energy. In addition, the dependence of the waveguide-coupling properties on ACMC geometry is also numerically investigated in this paper.
topic Semiconductor lasers
Waveguides
Plasmonics
url https://ieeexplore.ieee.org/document/9239875/
work_keys_str_mv AT baifuzhang designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
AT haifenghu designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
AT haowang designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
AT chenghan designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
AT zheshen designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
AT jixu designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
AT mingsun designandanalysisofasymmetriccapsuleshapedmetalliccavitiesforunidirectionalwaveguidecoupling
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