Gas-sensing and label-free detection of biomaterials employing multiple rings structured plasmonic nanosensor

In this paper, a refractive index sensor based on three circular rings coupled with a straight metal-insulator-metal (MIM) waveguide is presented. At near-infrared (NIR) spectrum, the spectral characteristics of the sensor are extensively analyzed using the finite element method (FEM). Moreover, the...

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Bibliographic Details
Published in:Sensing and Bio-Sensing Research 2021-08, Vol.33, p.100440, Article 100440
Main Authors: Rashid, Kazi Sharmeen, Hassan, Md. Farhad, Yaseer, Ahmad Azuad, Tathfif, Infiter, Sagor, Rakibul Hasan
Format: Article
Language:English
Subjects:
Biosensor
Fabrication error tolerance
Refractive index sensor
Surface plasmon polaritons
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Summary:In this paper, a refractive index sensor based on three circular rings coupled with a straight metal-insulator-metal (MIM) waveguide is presented. At near-infrared (NIR) spectrum, the spectral characteristics of the sensor are extensively analyzed using the finite element method (FEM). Moreover, the refractive index sensing property is comprehensively investigated by altering the design parameters. The results show a maximum sensitivity of 3573.3 nm/RIU with a figure of merit of 21.9, which is suitable for gas-sensing applications. The proposed sensor has also displayed prominent tolerance against manufacturing defects. Furthermore, the sensor proves to be highly sensitive for the label-free detection of blood components and DNA hybridization.
ISSN:2214-1804
2214-1804
DOI:10.1016/j.sbsr.2021.100440