Journal
RSC ADVANCES
Volume 7, Issue 75, Pages 47177-47182Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra08380g
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Funding
- National Natural Science Foundation of China [11504209, 11474187, 11774208, 11404195, 11674199]
- Shandong Province Natural Science Foundation [ZR2017BA004]
- Excellent Young Scholars Research Fund of Shandong Normal University
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We proposed a high sensitivity and a high resolution surface plasmon resonance sensor composed of graphene-WS2 hybrid nanostructure and Au-Ag bimetallic-layers film. The bimetallic-layer configuration uses the high sensitivity of gold and the narrow full width at half maximum (FWHM) of silver to improve the sensor's sensitivity and resolution respectively. Graphene and WS2 serve as an effective light absorption medium. Once they cover the bimetallic-layer, the sensitivity can be further improved significantly. Graphene-WS2-Au-Ag model shows a higher sensitivity and higher resolution than that of the conventional sensing scheme where pure Au thin film is used. In our paper, we mainly use Fresnel equations and the transfer matrix method (TMM) to study the reflectivity and sensitivity as well as the full width at half maximum (FWHM) of the SPR sensor.
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