Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications
Metamaterial absorbers (MMAs) are currently highly desirable because of their special absorption qualities. In this paper, a highly simplified and optimized terahertz MMA is proposed and analyzed for sensing applications. The proposed MMA is polarization-independent because of its symmetrical struct...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
|
| Series: | Biosensors and Bioelectronics: X |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590137024001249 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832591775112364032 |
|---|---|
| author | Tasnim Mahfuz Arif Hossan Naymur Rahman |
| author_facet | Tasnim Mahfuz Arif Hossan Naymur Rahman |
| author_sort | Tasnim Mahfuz |
| collection | DOAJ |
| description | Metamaterial absorbers (MMAs) are currently highly desirable because of their special absorption qualities. In this paper, a highly simplified and optimized terahertz MMA is proposed and analyzed for sensing applications. The proposed MMA is polarization-independent because of its symmetrical structure. Its symmetrical structure is achieved through the utilization of L-shaped gold patches. Being polarization-independent means that terahertz waves of any polarization can be efficiently absorbed by it. The proposed design consists of several L-shaped gold metallic patches over a polyimide substrate and a ground plane. It achieves an absorption of 96% at a specific frequency of 1.672 THz with a quality factor of 28.26. The quality factor indicates a sharp resonance peak, which is crucial for accurate sensing measurements. The absorber's resonance frequency changes with its surrounding medium's refractive index (RI). Thus, the MMA can also be used as a RI sensor. The RI has varied in the range of 1.304–1.342. The average sensitivity of the proposed sensor is 374 GHz/RIU. It is important to note that most biomedical samples have RI ranges from 1.3 to 1.39, making the proposed sensor highly suitable for a broad range of biomedical applications. The biomedical applications include non-invasive detection of subtle changes within tissues, monitoring drug delivery processes or even early-stage disease diagnosis. |
| format | Article |
| id | doaj-art-6f4d7d46aeb24a83af0b2eeb3932a250 |
| institution | Kabale University |
| issn | 2590-1370 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Biosensors and Bioelectronics: X |
| spelling | doaj-art-6f4d7d46aeb24a83af0b2eeb3932a2502025-01-22T05:43:54ZengElsevierBiosensors and Bioelectronics: X2590-13702025-03-0122100560Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applicationsTasnim Mahfuz0Arif Hossan1Naymur Rahman2Department of Electronics and Communication Engineering, Khulna University of Engineering & Technology (KUET), Khulna, 9203, BangladeshCorresponding author.; Department of Electronics and Communication Engineering, Khulna University of Engineering & Technology (KUET), Khulna, 9203, BangladeshDepartment of Electronics and Communication Engineering, Khulna University of Engineering & Technology (KUET), Khulna, 9203, BangladeshMetamaterial absorbers (MMAs) are currently highly desirable because of their special absorption qualities. In this paper, a highly simplified and optimized terahertz MMA is proposed and analyzed for sensing applications. The proposed MMA is polarization-independent because of its symmetrical structure. Its symmetrical structure is achieved through the utilization of L-shaped gold patches. Being polarization-independent means that terahertz waves of any polarization can be efficiently absorbed by it. The proposed design consists of several L-shaped gold metallic patches over a polyimide substrate and a ground plane. It achieves an absorption of 96% at a specific frequency of 1.672 THz with a quality factor of 28.26. The quality factor indicates a sharp resonance peak, which is crucial for accurate sensing measurements. The absorber's resonance frequency changes with its surrounding medium's refractive index (RI). Thus, the MMA can also be used as a RI sensor. The RI has varied in the range of 1.304–1.342. The average sensitivity of the proposed sensor is 374 GHz/RIU. It is important to note that most biomedical samples have RI ranges from 1.3 to 1.39, making the proposed sensor highly suitable for a broad range of biomedical applications. The biomedical applications include non-invasive detection of subtle changes within tissues, monitoring drug delivery processes or even early-stage disease diagnosis.http://www.sciencedirect.com/science/article/pii/S2590137024001249Metamaterial absorberPolarizationResonance frequencyTerahertz frequency rangeRefractive indexSensitivity |
| spellingShingle | Tasnim Mahfuz Arif Hossan Naymur Rahman Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications Biosensors and Bioelectronics: X Metamaterial absorber Polarization Resonance frequency Terahertz frequency range Refractive index Sensitivity |
| title | Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications |
| title_full | Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications |
| title_fullStr | Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications |
| title_full_unstemmed | Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications |
| title_short | Design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications |
| title_sort | design of a polarization independent terahertz metamaterial absorber for biomedical sensing applications |
| topic | Metamaterial absorber Polarization Resonance frequency Terahertz frequency range Refractive index Sensitivity |
| url | http://www.sciencedirect.com/science/article/pii/S2590137024001249 |
| work_keys_str_mv | AT tasnimmahfuz designofapolarizationindependentterahertzmetamaterialabsorberforbiomedicalsensingapplications AT arifhossan designofapolarizationindependentterahertzmetamaterialabsorberforbiomedicalsensingapplications AT naymurrahman designofapolarizationindependentterahertzmetamaterialabsorberforbiomedicalsensingapplications |