Tunable terahertz filter/antenna-sensor using graphene-based metamaterials

Meisam Esfandiyari; Ali Lalbakhsh; Saughar Jarchi; Mohsen Ghaffari-Miab; Hamideh Noori Mahtaj; Roy B.V.B. Simorangkir

Materials & Design (Aug 2022)

Tunable terahertz filter/antenna-sensor using graphene-based metamaterials

Meisam Esfandiyari,
Ali Lalbakhsh,
Saughar Jarchi,
Mohsen Ghaffari-Miab,
Hamideh Noori Mahtaj,
Roy B.V.B. Simorangkir

Affiliations

Meisam Esfandiyari: Faculty of Technical and Engineering, Imam Khomeini International University, Qazvin, Iran
Ali Lalbakhsh: School of Engineering, Macquarie University, Sydney, Australia; School of Electrical and Data Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia; Corresponding authors at: School of Engineering, Macquarie University, Sydney, Australia (A. Lalbakhsh) and Tyndall National Institute, University College Cork, Dyke Parade, T12R5CP, Cork, Ireland (R. B. V. B. Simorangkir).
Saughar Jarchi: Faculty of Technical and Engineering, Imam Khomeini International University, Qazvin, Iran
Mohsen Ghaffari-Miab: Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran
Hamideh Noori Mahtaj: Faculty of Electrical and Computer Engineering, Shahid Beheshti University, Tehran, Iran
Roy B.V.B. Simorangkir: Tyndall National Institute, University College Cork, Dyke Parade, T12R5CP Cork, Ireland; Corresponding authors at: School of Engineering, Macquarie University, Sydney, Australia (A. Lalbakhsh) and Tyndall National Institute, University College Cork, Dyke Parade, T12R5CP, Cork, Ireland (R. B. V. B. Simorangkir).

Journal volume & issue: Vol. 220
p. 110855

Abstract

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In this paper, a novel tunable graphene-based bandstop filter/antenna-sensor is presented. This structure is an integrated module that can be used to combine filtering and high-gain radiation performance. The initial design of the unit cell consists of four U-shaped stubs loaded, resembling the arms of a ring and a sensing layer in the substrate. The reflection and transmission spectra are obtained for various graphene’s chemical potentials and refractive index of sensing layer (Ns) of structure in the range of 1.3–1.6 THz. The proposed structure exhibits the attributes of both dual-band filter and single-band antenna-sensor. The conductivity of graphene and its structural parameters are studied to optimize the component performance. In filtering mode, the first bandstop is from 1.23 to 1.6 THz equal to 26% of fractional bandwidth (FBW) at 1.415 THz. The second stopband is centered at 3.12 THz with FBW of 14% for Ns = 1.6 and 0.6 eV chemical potential. In the antenna mode, a single band of the antenna-sensor is centered at 1.95 THz for the same Ns and same chemical potential. It is shown that a sensitivity of 0.145 THz/RIU is achieved at Ns = 1.5 and chemical potential of 0.6 eV. Additionally, the performance of the proposed filter/antenna-sensor module is investigated for different wave polarizations and oblique angles.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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