Enhanced Sensing Capacity of Terahertz Triple-Band Metamaterials Absorber Based on Pythagorean Fractal Geometry

Autor:	Alin Gheorghita Mazare, Yadgar I. Abdulkarim, Ayoub Sabir Karim, Mehmet Bakır, Mohamed Taouzari, Fahmi F. Muhammadsharif, Bhargav Appasani, Olcay Altıntaş, Muharrem Karaaslan, Nicu Bizon
Přispěvatelé:	Mühendislik ve Doğa Bilimleri Fakültesi -- Elektrik-Elektronik Mühendisliği Bölümü, Havacılık ve Uzay Bilimleri Fakültesi -- Havacılık Elektrik ve Elektroniği Bölümü, Altıntaş, Olcay, Karaaslan, Muharrem
Rok vydání:	2022
Předmět:	Design Materials Science Refractive index Broadband Frequency Selective Surfaces Natural frequencies Metamaterial Absorption spectroscopy Triple-band Metamaterial absorbers General Materials Science Resonance frequencies Sensor Ring-resonator Perfect absorber Energy Physics Metamaterials (MTM) Chemistry Analytes Fractal geometry Fractals Sensing capacity metamaterials (MTM) THz sensor perfect absorber Metamaterials Electrical Engineering Electronics & Computer Science - Wireless Technology - Metamaterials Metallurgy & Metallurgical Engineering Sensitivity analysis Tera Hertz Medical applications
Zdroj:	Materials; Volume 15; Issue 18; Pages: 6364
ISSN:	1996-1944
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2557a5c548db189d2e9f119447eb5797 https://pubmed.ncbi.nlm.nih.gov/36143675 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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