Highly Sensitive Graphene-Based Refractive Index Biosensor Using Gold Metasurface Array

Patel, Shobhit K. and Parmar, Juveriya and Trivedi, Himitri and Zakaria, Rozalina and Nguyen, Truong Khang and Dhasarathan, Vigneswaran (2020) Highly Sensitive Graphene-Based Refractive Index Biosensor Using Gold Metasurface Array. IEEE Photonics Technology Letters, 32 (12). pp. 681-684. ISSN 1041-1135, DOI https://doi.org/10.1109/LPT.2020.2992085.

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Official URL: https://doi.org/10.1109/LPT.2020.2992085


In this letter, a highly sensitive refractive index biosensor applicable in medical devices is proposed. The biosensor design is analyzed for different concentrations of hemoglobin biomolecules. The 70nm shift in the wavelength is observed for two hemoglobin biomolecules with 1.34 and 1.36 refractive index per unit (RIU). The highest sensitivity of 3500 nm/RIU is observed for these hemoglobin biomolecules. The results are analyzed for absorption, electric field and magnetic field. The design is also analyzed for different geometrical parameters like metasurface array thickness and silicon dioxide (SiO2) layer thickness. The increase in metasurface array thickness reduces the absorption of the design. The increase in the thickness of SiO2 layer increases the absorption till 0.6μm thickness than the response remains the same for other thicknesses. The proposed highly sensitive graphene-based metasurface array biosensor is applicable in medical and biosensing photovoltaic devices. © 1989-2012 IEEE.

Item Type: Article
Funders: ASEAN India S&T Development Fund (AISTDF) under Grant IMRC/AISTDF/CRD/2018/000012
Uncontrolled Keywords: Graphene; hemoglobin; metasurface array; sensitivity
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Aug 2020 07:50
Last Modified: 18 Aug 2020 07:50
URI: http://eprints.um.edu.my/id/eprint/25409

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