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Article

Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor

Sensors Lab, Advanced Membranes and Porous Materials Center, Computer, Electrical and Mathematical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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Sensors 2020, 20(8), 2347; https://doi.org/10.3390/s20082347
Received: 24 March 2020 / Revised: 16 April 2020 / Accepted: 17 April 2020 / Published: 20 April 2020
(This article belongs to the Special Issue 2D Material Based Plasmonic Biosensors)
We propose a spectrometer-free refractive index sensor based on a graphene plasmonic structure. The spectrometer-free feature of the device is realized thanks to the dynamic tunability of graphene’s chemical potential, through electrostatic biasing. The proposed sensor exhibits a 1566 nm/RIU sensitivity, a 250.6 RIU−1 figure of merit in the optical mode of operation and a 713.2 meV/RIU sensitivity, a 246.8 RIU−1 figure of merit in the electrical mode of operation. This performance outlines the optimized operation of this spectrometer-free sensor that simplifies its design and can bring terahertz sensing one step closer to its practical realization, with promising applications in biosensing and/or gas sensing. View Full-Text
Keywords: spectrometer-free sensing; graphene plasmonics; optical refractive index sensor spectrometer-free sensing; graphene plasmonics; optical refractive index sensor
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MDPI and ACS Style

Zhang, L.; Farhat, M.; Salama, K.N. Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor. Sensors 2020, 20, 2347. https://doi.org/10.3390/s20082347

AMA Style

Zhang L, Farhat M, Salama KN. Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor. Sensors. 2020; 20(8):2347. https://doi.org/10.3390/s20082347

Chicago/Turabian Style

Zhang, Li; Farhat, Mohamed; Salama, Khaled N. 2020. "Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor" Sensors 20, no. 8: 2347. https://doi.org/10.3390/s20082347

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