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Theoretical design of a surface plasmon resonance sensor with high sensitivity and high resolution based on graphene–WS2 hybrid nanostructures and Au–Ag bimetallic film
- Source :
- RSC Adv.. 7:47177-47182
- Publication Year :
- 2017
- Publisher :
- Royal Society of Chemistry (RSC), 2017.
-
Abstract
- 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.
- Subjects :
- Nanostructure
Materials science
business.industry
Graphene
General Chemical Engineering
Resolution (electron density)
Transfer-matrix method (optics)
02 engineering and technology
General Chemistry
Fresnel equations
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
010309 optics
Full width at half maximum
Optics
law
0103 physical sciences
Sensitivity (control systems)
Thin film
0210 nano-technology
business
Subjects
Details
- ISSN :
- 20462069
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- RSC Adv.
- Accession number :
- edsair.doi...........c96c57b71adbbcc4a3e587ac9b229a02