Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide

Planar waveguides limit the transmission of electromagnetic waves in a specific direction and have a wide range of applications in filters, sensors, and energy‐transfer devices. However, given the increasing demand for planar‐integrated photonics, new waveguides are required with excellent character...

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Auteurs principaux: Zhiwei Guo, Juan Song, Haitao Jiang, Hong Chen
Format: Article
Langue:English
Publié: Wiley-VCH 2021-08-01
Collection:Advanced Photonics Research
Sujets:
Accès en ligne:https://doi.org/10.1002/adpr.202100035
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author Zhiwei Guo
Juan Song
Haitao Jiang
Hong Chen
author_facet Zhiwei Guo
Juan Song
Haitao Jiang
Hong Chen
author_sort Zhiwei Guo
collection DOAJ
description Planar waveguides limit the transmission of electromagnetic waves in a specific direction and have a wide range of applications in filters, sensors, and energy‐transfer devices. However, given the increasing demand for planar‐integrated photonics, new waveguides are required with excellent characteristics such as more functionality, greater efficiency, and smaller size. Herein, the experimental results for a planar microwave‐regime waveguide fabricated from circuit‐based magnetic hyperbolic metamaterial (HMM) are reported. HMM is a special type of anisotropic metamaterial, whose isofrequency contour (IFC) takes the form of an open hyperboloid. Because of the open‐dispersion IFCs, HMMs support propagating high‐k modes with large effective refractive indices, which allow planar hyperbolic waveguides to be miniaturized. Especially, as opposed to the traditional dielectric slab waveguide, the group velocity and phase velocity in hyperbolic waveguides are oriented in opposite directions—a characteristic that is exploited to realize the backward propagation of electromagnetic waves. Based on this property, a backward coupler based on the hyperbolic waveguide is designed and experimented with. Herein, the significant potential of circuit‐based platforms for the experimental study of the propagation and coupling of guided modes is not only revealed but also the use of HMMs for numerous integrated functional devices is promoted.
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spelling doaj.art-494c8f81d2e44f93b4545d9da5a56a5f2022-12-21T22:22:19ZengWiley-VCHAdvanced Photonics Research2699-92932021-08-0128n/an/a10.1002/adpr.202100035Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic WaveguideZhiwei Guo0Juan Song1Haitao Jiang2Hong Chen3Key Laboratory of Advanced Micro-Structured Materials MOE School of Physics Science and Engineering Tongji University Shanghai 200092 ChinaKey Laboratory of Advanced Micro-Structured Materials MOE School of Physics Science and Engineering Tongji University Shanghai 200092 ChinaKey Laboratory of Advanced Micro-Structured Materials MOE School of Physics Science and Engineering Tongji University Shanghai 200092 ChinaKey Laboratory of Advanced Micro-Structured Materials MOE School of Physics Science and Engineering Tongji University Shanghai 200092 ChinaPlanar waveguides limit the transmission of electromagnetic waves in a specific direction and have a wide range of applications in filters, sensors, and energy‐transfer devices. However, given the increasing demand for planar‐integrated photonics, new waveguides are required with excellent characteristics such as more functionality, greater efficiency, and smaller size. Herein, the experimental results for a planar microwave‐regime waveguide fabricated from circuit‐based magnetic hyperbolic metamaterial (HMM) are reported. HMM is a special type of anisotropic metamaterial, whose isofrequency contour (IFC) takes the form of an open hyperboloid. Because of the open‐dispersion IFCs, HMMs support propagating high‐k modes with large effective refractive indices, which allow planar hyperbolic waveguides to be miniaturized. Especially, as opposed to the traditional dielectric slab waveguide, the group velocity and phase velocity in hyperbolic waveguides are oriented in opposite directions—a characteristic that is exploited to realize the backward propagation of electromagnetic waves. Based on this property, a backward coupler based on the hyperbolic waveguide is designed and experimented with. Herein, the significant potential of circuit‐based platforms for the experimental study of the propagation and coupling of guided modes is not only revealed but also the use of HMMs for numerous integrated functional devices is promoted.https://doi.org/10.1002/adpr.202100035guided modeshyperbolic metamaterialstopological transitions
spellingShingle Zhiwei Guo
Juan Song
Haitao Jiang
Hong Chen
Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide
Advanced Photonics Research
guided modes
hyperbolic metamaterials
topological transitions
title Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide
title_full Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide
title_fullStr Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide
title_full_unstemmed Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide
title_short Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide
title_sort miniaturized backward coupler realized by the circuit based planar hyperbolic waveguide
topic guided modes
hyperbolic metamaterials
topological transitions
url https://doi.org/10.1002/adpr.202100035
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