Open Access

ARTICLE

Computational Investigation of Multiband EMNZ Metamaterial Absorber for Terahertz Applications

by Ismail Hossain¹, Md Samsuzzaman², Mohd Hafiz Baharuddin^3,*, Norsuzlin Binti Mohd Sahar¹, Mandeep Singh Jit Singh¹, Mohammad Tariqul Islam³

1 Space Science Center, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia
2 Department of Computer and Communication Engineering, Faculty of Computer Science and Engineering, Patuakhali Science and Technology University, Bangladesh
3 Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Malaysia

* Corresponding Author: Mohd Hafiz Baharuddin. Email:

Computers, Materials & Continua 2022, 71(2), 3905-3920. https://doi.org/10.32604/cmc.2022.022027

Received 25 July 2021; Accepted 22 September 2021; Issue published 07 December 2021

Abstract

This study presents an Epsilon Mu near-zero (EMNZ) nanostructured metamaterial absorber (NMMA) for visible regime applications. The resonator and dielectric layers are made of tungsten (W) and quartz (fused), where the working band is expanded by changing the resonator layer's design. Due to perfect impedance matching with plasmonic resonance characteristics, the proposed NMMA structure is achieved an excellent absorption of 99.99% at 571 THz, 99.50% at 488.26 THz, and 99.32% at 598 THz frequencies. The absorption mechanism is demonstrated by the theory of impedance, electric field, and power loss density distributions, respectively. The geometric parameters are explored and analyzed to show the structure's performance, and a near-field pattern is used to explain the absorption mechanism at the resonance frequency point. The numerical analysis method describes that the proposed structure exhibited more than 80% absorbability between 550 and 900 THz. The Computer Simulation Technology (CST Microwave Studio 2019) software is used to design the proposed structure. Furthermore, CST-HFSS interference is validated by the simulation data with the help of the finite element method (FEM). The proposed NMMA structure is also exhibits glucose concentration sensing capability as applications. So the proposed broadband absorber may have a potential application in THz sensing, imaging (MRI, thermal, color), solar energy harvesting, light modulators, and optoelectronic devices.

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Keywords

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