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Giant Goos-Hänchen Shifts in Au-ITO-TMDCs-Graphene Heterostructure and Its Potential for High Performance Sensor

1
School of Mechanical Engineering and Electronic Information, China University of Geosciences (Wuhan), Wuhan 430074, China
2
Institute of Marine Geological Exploration Technology, Guangzhou Marine Geology Survey, Guangzhou 510075, China
3
Beijing Orient Institute of Measurement and Test, Beijing 100094, China
*
Authors to whom correspondence should be addressed.
Sensors 2020, 20(4), 1028; https://doi.org/10.3390/s20041028
Received: 16 January 2020 / Revised: 8 February 2020 / Accepted: 9 February 2020 / Published: 14 February 2020
(This article belongs to the Special Issue 2D Material based Plasmonic Biosensors)
In order to improve the performance of surface plasmon resonance (SPR) biosensor, the structure based on two-dimensional (2D) of graphene and transition metal dichalcogenides (TMDCs) are proposed to greatly enhance the Goos-Hänchen (GH) shift. It is theoretically proved that GH shift can be significantly enhanced in SPR structure coated with gold (Au)-indium tin oxide (ITO)-TMDCs-graphene heterostructure. In order to realize high GH shifts, the number of TMDCs and graphene layer are optimized. The highest GH shift (−801.7 λ) is obtained by Au-ITO-MoSe2-graphene hybrid structure with MoSe2 monolayer and graphene bilayer, respectively. By analyzing the GH variation, the index sensitivity of such configuration can reach as high as 8.02 × 105 λ/RIU, which is 293.24 times of the Au-ITO structure and 177.43 times of the Au-ITO-graphene structure. The proposed SPR biosensor can be widely used in the precision metrology and optical sensing. View Full-Text
Keywords: surface plasmon resonance; Goos-Hänchen shifts; transition metal dichalcogenides; graphene; sensitivity surface plasmon resonance; Goos-Hänchen shifts; transition metal dichalcogenides; graphene; sensitivity
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MDPI and ACS Style

Han, L.; Pan, J.; Wu, C.; Li, K.; Ding, H.; Ji, Q.; Yang, M.; Wang, J.; Zhang, H.; Huang, T. Giant Goos-Hänchen Shifts in Au-ITO-TMDCs-Graphene Heterostructure and Its Potential for High Performance Sensor. Sensors 2020, 20, 1028.

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