Graphene-Based Highly Sensitive Refractive Index Biosensors Using C-Shaped Metasurface

Patel, Shobhit K. and Parmar, Juveriya and Kosta, Yogeshwar P. and Charola, Shreyas and Zakaria, Rozalina and Nguyen, Truong Khang and Dhasarathan, Vigneswaran (2020) Graphene-Based Highly Sensitive Refractive Index Biosensors Using C-Shaped Metasurface. IEEE Sensors Journal, 20 (12). pp. 6359-6366. ISSN 1530-437X, DOI

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In this work, graphene-based metasurface infrared biosensors are presented. The C-shaped tungsten metasurface is placed over graphene material to achieve higher sensitivity. The sensitivity of biosensors depends on how the absorption peak is shifted by the addition of biomolecules over the sensor. The wavelength shift of 900nm is achieved for the proposed biosensors with haemoglobin biomolecules. The sensitivity of 2571 nm/RIU is achieved by using this graphene-based metasurface design. The sensitivity of hemoglobin biomolecules with urine biomolecules is also investigated and it is 3846nm/RIU. The sensitivity of the proposed biosensors is varied by changing the design parameters such as C-shaped tungsten metasurface thickness, C-shaped tungsten metasurface width, SiO2 layer thickness, and tungsten bottom layer thickness. The proposed biosensors design is also compared with other published researches and showing better sensitivity than these published researches. The optimized physical parameters are achieved in this paper. The proposed highly sensitive biosensors is having great potential to become a building block for medical biosensing devices and photovoltaic devices. © 2001-2012 IEEE.

Item Type: Article
Funders: ASEAN-India Science and Technology Development Fund (AISTDF) under Grant IMRC/AISTDF/CRD/2018/ 000012
Uncontrolled Keywords: graphene; metasurface; peak wavelength and sensitivity; Sensor
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 07:53
Last Modified: 18 Aug 2020 07:53

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