Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber
Broadband Terahertz (THz) metamaterial absorbers with tunable absorption characteristics have been attracting a lot of attention due to their high demand and utilization in advanced optical systems. Therefore, we propose a single-layer graphene-supported metamaterial absorber with a combination of s...
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IEEE
2023-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/10295980/ |
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| author | Muhammad Abdul Jabbar Muhammad Ashar Naveed Muhammad Zubair Muhammad Qasim Mehmood Yehia Massoud |
| author_facet | Muhammad Abdul Jabbar Muhammad Ashar Naveed Muhammad Zubair Muhammad Qasim Mehmood Yehia Massoud |
| author_sort | Muhammad Abdul Jabbar |
| collection | DOAJ |
| description | Broadband Terahertz (THz) metamaterial absorbers with tunable absorption characteristics have been attracting a lot of attention due to their high demand and utilization in advanced optical systems. Therefore, we propose a single-layer graphene-supported metamaterial absorber with a combination of square, circular and cross-shaped meta-resonators, exhibiting an outstanding absorption of more than 90% from 2.3 THz to 6.4 THz. The overall size of the unit cell is 15 × 15 μm<sup>2</sup>, which holds graphene-based meta-resonators etched over a lossy dielectric substrate, backed by a 0.2 μm thick gold as a perfect reflector. This design architecture achieves the ultra-broadband absorption features by continuous design evaluation and optimization. The graphene-based metamaterial absorber (GMMA) reveals a polarization-insensitive response, and it also provides above 70% absorption for obliquely incident angles over the large operating bandwidth (2.3–6.4 THz). The polarization conversion ratio (PCR) also approached zero over the wideband of 4.1 THz and its maximum value of 16% was recorded at 4 THz. Furthermore, the amplitude spectra of the proposed GMMA is modulated from 19% to above 90% by stimulating the chemical potential of graphene from 0 eV to 0.7 eV. The simplified design configuration, broadband absorption features, and tunable capability of the GMMA provide the pathway to develop high-speed optical switches, THz detectors, and other opto-electronic devices. |
| format | Article |
| id | doaj-art-dbd12094286a4c90bbd4d277c07c61c6 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | IEEE |
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| series | IEEE Photonics Journal |
| spelling | doaj-art-dbd12094286a4c90bbd4d277c07c61c62025-08-20T03:15:48ZengIEEEIEEE Photonics Journal1943-06552023-01-011561810.1109/JPHOT.2023.332712410295980Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial AbsorberMuhammad Abdul Jabbar0https://orcid.org/0009-0002-1063-8166Muhammad Ashar Naveed1Muhammad Zubair2https://orcid.org/0000-0001-6664-5483Muhammad Qasim Mehmood3https://orcid.org/0000-0002-2793-2137Yehia Massoud4https://orcid.org/0000-0002-6701-0639Innovative Technologies Laboratories (ITL), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi ArabiaInnovative Technologies Laboratories (ITL), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi ArabiaMicroNano Lab, Electrical Engineering Department, Information Technology University (ITU) of the Punjab, Lahore, PakistanMicroNano Lab, Electrical Engineering Department, Information Technology University (ITU) of the Punjab, Lahore, PakistanInnovative Technologies Laboratories (ITL), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi ArabiaBroadband Terahertz (THz) metamaterial absorbers with tunable absorption characteristics have been attracting a lot of attention due to their high demand and utilization in advanced optical systems. Therefore, we propose a single-layer graphene-supported metamaterial absorber with a combination of square, circular and cross-shaped meta-resonators, exhibiting an outstanding absorption of more than 90% from 2.3 THz to 6.4 THz. The overall size of the unit cell is 15 × 15 μm<sup>2</sup>, which holds graphene-based meta-resonators etched over a lossy dielectric substrate, backed by a 0.2 μm thick gold as a perfect reflector. This design architecture achieves the ultra-broadband absorption features by continuous design evaluation and optimization. The graphene-based metamaterial absorber (GMMA) reveals a polarization-insensitive response, and it also provides above 70% absorption for obliquely incident angles over the large operating bandwidth (2.3–6.4 THz). The polarization conversion ratio (PCR) also approached zero over the wideband of 4.1 THz and its maximum value of 16% was recorded at 4 THz. Furthermore, the amplitude spectra of the proposed GMMA is modulated from 19% to above 90% by stimulating the chemical potential of graphene from 0 eV to 0.7 eV. The simplified design configuration, broadband absorption features, and tunable capability of the GMMA provide the pathway to develop high-speed optical switches, THz detectors, and other opto-electronic devices.https://ieeexplore.ieee.org/document/10295980/AbsorberbroadbandgraphenePCRterahertztunable |
| spellingShingle | Muhammad Abdul Jabbar Muhammad Ashar Naveed Muhammad Zubair Muhammad Qasim Mehmood Yehia Massoud Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber IEEE Photonics Journal Absorber broadband graphene PCR terahertz tunable |
| title | Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber |
| title_full | Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber |
| title_fullStr | Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber |
| title_full_unstemmed | Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber |
| title_short | Wideband Polarization Insensitive Tunable Graphene-Supported Terahertz Metamaterial Absorber |
| title_sort | wideband polarization insensitive tunable graphene supported terahertz metamaterial absorber |
| topic | Absorber broadband graphene PCR terahertz tunable |
| url | https://ieeexplore.ieee.org/document/10295980/ |
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