Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry
A new design of a triple band perfect metamaterial absorber based on Pythagorean fractal geometry is proposed and analyzed for terahertz sensing applications. The proposed design showed an enhanced sensing performance and achieved three intensive peaks at 33.93, 36.27, and 38.39 THz, corresponding t...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/18/6364 |
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| author | Alin Gheorghita Mazare Yadgar I. Abdulkarim Ayoub Sabir Karim Mehmet Bakır Mohamed Taouzari Fahmi F. Muhammadsharif Bhargav Appasani Olcay Altıntaş Muharrem Karaaslan Nicu Bizon |
| author_facet | Alin Gheorghita Mazare Yadgar I. Abdulkarim Ayoub Sabir Karim Mehmet Bakır Mohamed Taouzari Fahmi F. Muhammadsharif Bhargav Appasani Olcay Altıntaş Muharrem Karaaslan Nicu Bizon |
| author_sort | Alin Gheorghita Mazare |
| collection | DOAJ |
| description | A new design of a triple band perfect metamaterial absorber based on Pythagorean fractal geometry is proposed and analyzed for terahertz sensing applications. The proposed design showed an enhanced sensing performance and achieved three intensive peaks at 33.93, 36.27, and 38.39 THz, corresponding to the absorptivity of 98.5%, 99.3%, and 99.6%, respectively. Due to the symmetrical nature of the recommended design, the structure exhibited the characteristics of independency on the incident wave angles. Furthermore, a parametric study was performed to show the effects of the change in substrate type, resonator material, and substrate thickness on the absorption spectrum. At a fixed analyte thickness (0.5 μm), the resonance frequency of the design was found to be sensitive to the refractive index of the surrounding medium. The proposed design presented three ultra-sensitive responses of 1730, 1590, and 2050 GHz/RIU with the figure of merit (FoM) of 3.20, 1.54, and 4.28, respectively, when the refractive index was changed from 1.0 to 1.4. Additionally, the metamaterial sensor showed a sensitivity of 1230, 2270, and 1580 GHz/μm at the three resonance frequencies, respectively, when it was utilized for the detection of thickness variation at a fixed analyte refractive index (RI) of 1.4. As long as the RI of the biomedical samples is between 1.3 and 1.4, the proposed sensor can be used for biomedical applications. |
| first_indexed | 2024-03-09T23:17:33Z |
| format | Article |
| id | doaj.art-6265374c1b3d4d1b955cd9681dc2d2da |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T23:17:33Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6265374c1b3d4d1b955cd9681dc2d2da2023-11-23T17:32:19ZengMDPI AGMaterials1996-19442022-09-011518636410.3390/ma15186364Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal GeometryAlin Gheorghita Mazare0Yadgar I. Abdulkarim1Ayoub Sabir Karim2Mehmet Bakır3Mohamed Taouzari4Fahmi F. Muhammadsharif5Bhargav Appasani6Olcay Altıntaş7Muharrem Karaaslan8Nicu Bizon9Faculty of Electronics, Communication and Computers, University of Pitesti, 110040 Pitesti, RomaniaMedical Physics Department, College of Medicals & Applied Science, Charmo University, Chamchamal 46023, IraqPhysics Department, College of Education, Salahaddin University-Erbil, Erbil 44002, IraqDepartment of Computer Engineering, Bozok University, Yozgat 66200, TurkeyLaboratory LISA, Hassan First University of Settat, National School of Applied Sciences, Berrechid 26100, MoroccoDepartment of Physics, Faculty of Science and Health, Koya University, Koya 44023, IraqSchool of Electronics Engineering, KIIT University, Bhubaneswar 751024, Odisha, IndiaDepartment of Electrical-Electronics Engineering, Iskenderun Technical University, Hatay 31200, TurkeyDepartment of Electrical-Electronics Engineering, Iskenderun Technical University, Hatay 31200, TurkeyFaculty of Electronics, Communication and Computers, University of Pitesti, 110040 Pitesti, RomaniaA new design of a triple band perfect metamaterial absorber based on Pythagorean fractal geometry is proposed and analyzed for terahertz sensing applications. The proposed design showed an enhanced sensing performance and achieved three intensive peaks at 33.93, 36.27, and 38.39 THz, corresponding to the absorptivity of 98.5%, 99.3%, and 99.6%, respectively. Due to the symmetrical nature of the recommended design, the structure exhibited the characteristics of independency on the incident wave angles. Furthermore, a parametric study was performed to show the effects of the change in substrate type, resonator material, and substrate thickness on the absorption spectrum. At a fixed analyte thickness (0.5 μm), the resonance frequency of the design was found to be sensitive to the refractive index of the surrounding medium. The proposed design presented three ultra-sensitive responses of 1730, 1590, and 2050 GHz/RIU with the figure of merit (FoM) of 3.20, 1.54, and 4.28, respectively, when the refractive index was changed from 1.0 to 1.4. Additionally, the metamaterial sensor showed a sensitivity of 1230, 2270, and 1580 GHz/μm at the three resonance frequencies, respectively, when it was utilized for the detection of thickness variation at a fixed analyte refractive index (RI) of 1.4. As long as the RI of the biomedical samples is between 1.3 and 1.4, the proposed sensor can be used for biomedical applications.https://www.mdpi.com/1996-1944/15/18/6364metamaterials (MTM)THzsensorperfect absorber |
| spellingShingle | Alin Gheorghita Mazare Yadgar I. Abdulkarim Ayoub Sabir Karim Mehmet Bakır Mohamed Taouzari Fahmi F. Muhammadsharif Bhargav Appasani Olcay Altıntaş Muharrem Karaaslan Nicu Bizon Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry Materials metamaterials (MTM) THz sensor perfect absorber |
| title | Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry |
| title_full | Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry |
| title_fullStr | Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry |
| title_full_unstemmed | Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry |
| title_short | Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry |
| title_sort | enhanced sensing capacity of terahertz triple band metamaterials absorber based on pythagorean fractal geometry |
| topic | metamaterials (MTM) THz sensor perfect absorber |
| url | https://www.mdpi.com/1996-1944/15/18/6364 |
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