Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures

A symmetric graphene plasmon waveguide (SGPWG) is proposed here to achieve excellent subwavelength waveguiding performance of mid-infrared waves. The modal properties of the fundamental graphene plasmon mode are investigated by use of the finite element method. Due to the naturally rounded tips, the...

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Main Authors:	Da Teng, Yuncheng Wang, Tianzi Xu, Huayu Wang, Qinqin Shao, Yanan Tang
Format:	Article
Language:	English
Published:	MDPI AG 2021-05-01
Series:	Nanomaterials
Subjects:	graphene plasmons waveguides subwavelength structures mid-infrared waves
Online Access:	https://www.mdpi.com/2079-4991/11/5/1281

id	doaj-9588c0e2c0724b30b3a4c5c5b2db795a
record_format	Article
spelling	doaj-9588c0e2c0724b30b3a4c5c5b2db795a2021-05-31T23:58:03ZengMDPI AGNanomaterials2079-49912021-05-01111281128110.3390/nano11051281Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic StructuresDa Teng0Yuncheng Wang1Tianzi Xu2Huayu Wang3Qinqin Shao4Yanan Tang5College of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, ChinaCollege of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, ChinaCollege of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, ChinaCollege of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, ChinaCollege of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, ChinaCollege of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou 450044, ChinaA symmetric graphene plasmon waveguide (SGPWG) is proposed here to achieve excellent subwavelength waveguiding performance of mid-infrared waves. The modal properties of the fundamental graphene plasmon mode are investigated by use of the finite element method. Due to the naturally rounded tips, the plasmon mode in SGPWG could achieve a normalized mode field area of ~10<sup>−5</sup> (or less) and a figure of merit over 400 by tuning the key geometric structure parameters and the chemical potential of graphene. In addition, results show that the modal performance of SGPWG seems to improve over its circular counterparts. Besides the modal properties, crosstalk analysis indicates that the proposed waveguide exhibits extremely low crosstalk, even at a separation distance of 64 nm. Due to these excellent characteristics, the proposed waveguide has promising applications in ultra-compact integrated photonic components and other intriguing nanoscale devices.https://www.mdpi.com/2079-4991/11/5/1281graphene plasmonswaveguidessubwavelength structuresmid-infrared waves
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Da Teng Yuncheng Wang Tianzi Xu Huayu Wang Qinqin Shao Yanan Tang
spellingShingle	Da Teng Yuncheng Wang Tianzi Xu Huayu Wang Qinqin Shao Yanan Tang Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures Nanomaterials graphene plasmons waveguides subwavelength structures mid-infrared waves
author_facet	Da Teng Yuncheng Wang Tianzi Xu Huayu Wang Qinqin Shao Yanan Tang
author_sort	Da Teng
title	Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures
title_short	Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures
title_full	Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures
title_fullStr	Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures
title_full_unstemmed	Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures
title_sort	symmetric graphene dielectric nanowaveguides as ultra-compact photonic structures
publisher	MDPI AG
series	Nanomaterials
issn	2079-4991
publishDate	2021-05-01
description	A symmetric graphene plasmon waveguide (SGPWG) is proposed here to achieve excellent subwavelength waveguiding performance of mid-infrared waves. The modal properties of the fundamental graphene plasmon mode are investigated by use of the finite element method. Due to the naturally rounded tips, the plasmon mode in SGPWG could achieve a normalized mode field area of ~10<sup>−5</sup> (or less) and a figure of merit over 400 by tuning the key geometric structure parameters and the chemical potential of graphene. In addition, results show that the modal performance of SGPWG seems to improve over its circular counterparts. Besides the modal properties, crosstalk analysis indicates that the proposed waveguide exhibits extremely low crosstalk, even at a separation distance of 64 nm. Due to these excellent characteristics, the proposed waveguide has promising applications in ultra-compact integrated photonic components and other intriguing nanoscale devices.
topic	graphene plasmons waveguides subwavelength structures mid-infrared waves
url	https://www.mdpi.com/2079-4991/11/5/1281
work_keys_str_mv	AT dateng symmetricgraphenedielectricnanowaveguidesasultracompactphotonicstructures AT yunchengwang symmetricgraphenedielectricnanowaveguidesasultracompactphotonicstructures AT tianzixu symmetricgraphenedielectricnanowaveguidesasultracompactphotonicstructures AT huayuwang symmetricgraphenedielectricnanowaveguidesasultracompactphotonicstructures AT qinqinshao symmetricgraphenedielectricnanowaveguidesasultracompactphotonicstructures AT yanantang symmetricgraphenedielectricnanowaveguidesasultracompactphotonicstructures
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Symmetric Graphene Dielectric Nanowaveguides as Ultra-Compact Photonic Structures

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