Electrically enhanced graphene-metal plasmonic antenna for infrared sensing

An optical graphene-metal hybrid antenna geometry, permitting the efficient tuning of plasmon resonance with unity absorption is reported. The total optical absorption and optical field enhancement are accomplished by designing a graphene-metal antenna. The antenna is comprised of gold hexagon radia...

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Main Authors: Ullah, Z., Nawi, I., Witjaksono, G., Tansu, N., Khattak, M.I., Junaid, M., Usman, F.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23882 /
Published: Elsevier GmbH 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105267794&doi=10.1016%2fj.ijleo.2021.166961&partnerID=40&md5=ef82534d674bf906c4d6487ba85b7f04
http://eprints.utp.edu.my/23882/
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spelling utp-eprints.238822021-08-19T13:24:51Z Electrically enhanced graphene-metal plasmonic antenna for infrared sensing Ullah, Z. Nawi, I. Witjaksono, G. Tansu, N. Khattak, M.I. Junaid, M. Usman, F. An optical graphene-metal hybrid antenna geometry, permitting the efficient tuning of plasmon resonance with unity absorption is reported. The total optical absorption and optical field enhancement are accomplished by designing a graphene-metal antenna. The antenna is comprised of gold hexagon radiator with bilayer graphene on the top, functioning as a double plasmonic resonant structure. The tunability of absorption and optical field enhancement is realized by electrical gating. The strong coupling takes place between the gold plasmons and graphene plasmons, resulting in the strong enhancement of optical fields. The proposed design is modeled in CST Microwave Studio and is simulated through FDTD solver. Moreover, the dynamic tuning of the resonance frequency and optical absorption is achieved by increasing the chemical potential of graphene layers through gate voltage. The tuning range of the designed antenna is optimized in a bandwidth starting from 30 THz to 34 THz. Although at 33 THz the antenna meets matching conditions by having high input impedance, low admittance, and almost unity absorption. The functioning bandwidth of the antenna is preferable for plasmonic applications i.e. infrared sensing and imaging, where high absorption and enhanced field characteristics are required. © 2021 Elsevier GmbH Elsevier GmbH 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105267794&doi=10.1016%2fj.ijleo.2021.166961&partnerID=40&md5=ef82534d674bf906c4d6487ba85b7f04 Ullah, Z. and Nawi, I. and Witjaksono, G. and Tansu, N. and Khattak, M.I. and Junaid, M. and Usman, F. (2021) Electrically enhanced graphene-metal plasmonic antenna for infrared sensing. Optik, 241 . http://eprints.utp.edu.my/23882/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description An optical graphene-metal hybrid antenna geometry, permitting the efficient tuning of plasmon resonance with unity absorption is reported. The total optical absorption and optical field enhancement are accomplished by designing a graphene-metal antenna. The antenna is comprised of gold hexagon radiator with bilayer graphene on the top, functioning as a double plasmonic resonant structure. The tunability of absorption and optical field enhancement is realized by electrical gating. The strong coupling takes place between the gold plasmons and graphene plasmons, resulting in the strong enhancement of optical fields. The proposed design is modeled in CST Microwave Studio and is simulated through FDTD solver. Moreover, the dynamic tuning of the resonance frequency and optical absorption is achieved by increasing the chemical potential of graphene layers through gate voltage. The tuning range of the designed antenna is optimized in a bandwidth starting from 30 THz to 34 THz. Although at 33 THz the antenna meets matching conditions by having high input impedance, low admittance, and almost unity absorption. The functioning bandwidth of the antenna is preferable for plasmonic applications i.e. infrared sensing and imaging, where high absorption and enhanced field characteristics are required. © 2021 Elsevier GmbH
format Article
author Ullah, Z.
Nawi, I.
Witjaksono, G.
Tansu, N.
Khattak, M.I.
Junaid, M.
Usman, F.
spellingShingle Ullah, Z.
Nawi, I.
Witjaksono, G.
Tansu, N.
Khattak, M.I.
Junaid, M.
Usman, F.
Electrically enhanced graphene-metal plasmonic antenna for infrared sensing
author_sort Ullah, Z.
title Electrically enhanced graphene-metal plasmonic antenna for infrared sensing
title_short Electrically enhanced graphene-metal plasmonic antenna for infrared sensing
title_full Electrically enhanced graphene-metal plasmonic antenna for infrared sensing
title_fullStr Electrically enhanced graphene-metal plasmonic antenna for infrared sensing
title_full_unstemmed Electrically enhanced graphene-metal plasmonic antenna for infrared sensing
title_sort electrically enhanced graphene-metal plasmonic antenna for infrared sensing
publisher Elsevier GmbH
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85105267794&doi=10.1016%2fj.ijleo.2021.166961&partnerID=40&md5=ef82534d674bf906c4d6487ba85b7f04
http://eprints.utp.edu.my/23882/
_version_ 1741196747946852352
score 11.62408

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