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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14500
Title: Surface Plasmon Resonance-Based Sensors Using Nano-Ribbons of Graphene and WSe2
Authors: Bijalwan A.
Singh B.K.
Rastogi, Vipul K.
Published in: Plasmonics
Abstract: We show performance enhancement of surface plasmon resonance (SPR)-based sensors using the nano-ribbons of 2D materials such as graphene and WSe2. 2D material-based structures are useful for refractive index sensing. In this work, conventional graphene-/WSe2-based sensors (in which continuous film of graphene or WSe2 is coated on metal) and graphene/WSe2 nano-ribbon-based sensors are investigated for high quality factors and detection accuracies. Numerical simulations using rigorous coupled wave analysis (RCWA) have been carried out to analyze the sensing performance of the sensors. We show that the possible maximum quality factors 164.28 RIU−1 (162.5 RIU−1) and detection accuracy 0.82 (0.81), can be achieved using conventional sensor based on graphene (WSe2). To improve the performance, we propose a sensor consisting graphene/WSe2 nano-ribbons instead of graphene/WSe2 films. It is shown that by using the nano-ribbons, we could enhance the quality factor by 12.5% (164.28 RIU−1 to 184.97 RIU−1) in case of graphene and 11.4% (162.5 RIU−1 to 181.11 RIU−1) in case of WSe2. Detection accuracy could be improved from 0.82 to 0.92 for graphene nano-ribbons and 0.81 to 0.90 for WSe2 nano-ribbons. Proposed nano-ribbon-based sensors exhibit better sensing performance in comparison to conventional continuous film-based sensors. The study will be useful for designing graphene-/WSe2-based gas sensors and biosensors. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.
Citation: Plasmonics (2020), 15(4): 1015-1023
URI: https://doi.org/10.1007/s11468-020-01122-w
http://repository.iitr.ac.in/handle/123456789/14500
Issue Date: 2020
Publisher: Springer
Keywords: Graphene
SPR sensors
Surface plasmon resonance
Transition metal dichalcogenides
WSe2
ISSN: 15571955
Author Scopus IDs: 57193803914
56242223600
7006364661
Author Affiliations: Bijalwan, A., Department of Physics, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Singh, B.K., Department of Physics, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Rastogi, V., Department of Physics, Indian Institute of Technology, Roorkee, Uttarakhand 247667, India
Corresponding Author: Bijalwan, A.; Department of Physics, Indian Institute of TechnologyIndia; email: abijalwan@ph.iitr.ac.in
Appears in Collections:Journal Publications [PH]

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