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Sensors 2018, 18(1), 287; https://doi.org/10.3390/s18010287

Multiple Fano-Like MIM Plasmonic Structure Based on Triangular Resonator for Refractive Index Sensing

BioSense Institute-Research Institute for Information Technologies in Biosystems, University of Novi Sad, Dr Zorana Djindjica 1a, 21000 Novi Sad, Serbia
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Received: 1 December 2017 / Revised: 19 December 2017 / Accepted: 21 December 2017 / Published: 19 January 2018
(This article belongs to the Section Biosensors)
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Abstract

In this paper, we present a Fano metal-insulator-metal (MIM) structure based on an isosceles triangular cavity resonator for refractive index sensing applications. Due to the specific feeding scheme and asymmetry introduced in the triangular cavity, the resonator exhibits four sharp Fano-like resonances. The behavior of the structure is analyzed in detail and its sensing capabilities demonstrated through the responses for various refractive indices. The results show that the sensor has very good sensitivity and maximal figure of merit (FOM) value of 3.2 × 105. In comparison to other similar sensors, the proposed one has comparable sensitivity and significantly higher FOM, which clearly demonstrates its high sensing potential. View Full-Text
Keywords: Fano resonance; metal-insulator-metal; plasmonic sensor; triangular cavity Fano resonance; metal-insulator-metal; plasmonic sensor; triangular cavity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Jankovic, N.; Cselyuszka, N. Multiple Fano-Like MIM Plasmonic Structure Based on Triangular Resonator for Refractive Index Sensing. Sensors 2018, 18, 287.

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