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Graphene‐TMDC‐Graphene Hybrid Plasmonic Metasurface for Enhanced Biosensing: A Theoretical Analysis
Author(s) -
Jiang Li,
Zeng Shuwen,
Ouyang Qingling,
Dinh XuanQuyen,
Coquet Philippe,
Qu Junle,
He Sailing,
Yong KenTye
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700563
Subject(s) - graphene , materials science , biosensor , plasmon , surface plasmon resonance , nanotechnology , nanostructure , substrate (aquarium) , characterization (materials science) , optoelectronics , nanoparticle , oceanography , geology
In this work, a plasmonic metasurface for ultra‐sensitive biosensing based on graphene‐transition metal dichalcogenide (TMDC)‐graphene hybrid nanostructures are designed. The coating of the two‐dimensional nanosheets plays an important role for the sensitivity enhancement of the biosensors at the atomic scale. To achieve the maximum plasmon resonance energy transfer, different parameters of the hybrid nanostructures are systematically investigated including the material types and the number of TMDC layers. The important characteristics of plasmonic biosensors such as dark minimum reflectivity, sharp differential phase change, high sensitivity and narrow full width at half maximum (FWHM) are carefully studied in this work to demonstrate the improved surface plasmon resonance sensing performances of the TMDC‐based metasurfaces. The graphene‐TMDC‐graphene configurations with four different types of materials including MoS 2 /WS 2 /MoSe 2 /WSe 2 are optimized respectively for potential sensing applications. Based on our theoretical analysis, the enhanced maximum sensitivity of graphene‐TMDC‐graphene hybrid nanostructure is three orders of magnitude higher than that of the conventional bare metallic substrate.