Design of a high-performance graphene/SiO<sub>2</sub>-Ag periodic grating/MoS<sub>2</sub> surface plasmon resonance sensor

XiaoLin Liu; Jin Liu; HaiMa Yang; Bo Huang; GuoHui Zeng

doi:10.1364/AO.465640

Applied Optics
Vol. 61,
Issue 23,
pp. 6752-6760
(2022)
•https://doi.org/10.1364/AO.465640

Design of a high-performance graphene/SiO₂-Ag periodic grating/MoS₂ surface plasmon resonance sensor

XiaoLin Liu, Jin Liu, HaiMa Yang, Bo Huang, and GuoHui Zeng

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XiaoLin Liu, Jin Liu, HaiMa Yang, Bo Huang, and GuoHui Zeng, "Design of a high-performance graphene/SiO₂-Ag periodic grating/MoS₂ surface plasmon resonance sensor," Appl. Opt. 61, 6752-6760 (2022)

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Abstract

This study optimizes a surface plasmon resonance (SPR) sensor based on ${{\rm SiO}_2} {\text -} {\rm Ag}$ periodic grating using graphene and a ${{\rm MoS}_2}$ hybrid structure to enhance sensitivity. The sensing performance was analyzed by wavelength modulation. By optimizing the structural parameters, we can obtain the quality factor and sensitivity of ${90.192}\;{{\rm RIU}^{- 1}}$ and ${960}\;{\rm nm} \cdot {{\rm RIU}^{- 1}}$. The periodic grating surface covered with ${{\rm MoS}_2}$ prevents the oxidation of the silver layer and increases the adsorption of biomolecules. Compared with the conventional silver grating SPR sensor, the sensor’s sensitivity and quality factor can be significantly enhanced. Experiments were carried out using sucrose solutions with different refractive indices, and the results indicate there was a good linear relationship between the resonance wavelength and the sucrose solution. The sensor has vast potential for practical applications.

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Data availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Device Structure	Stacking of Layers
Structure 1	BK7 prim/Ag layer/Ag grating
Structure 2	$B K 7 {p r i m / S i O}_{2} l a y e r / {S i O}_{2} - A g g r a t i n g / A g l a y e r$
Structure 3	$B K 7 {p r i m / g r a p h e n e / S i O}_{2} l a y e r / {S i O}_{2} - A g g r a t i n g / A g l a y e r$
Structure 4	$B K 7 {p r i m / g r a p h e n e / S i O}_{2} l a y e r / {S i O}_{2} - A g g r a t i n g / A g l a y e r / {M o S}_{2} l a y e r$

Device Structure	$Δ λ$ (nm)	Sensitivity (nm· ${R I U}^{- 1}$ )	FWHM (nm)	FOM ( ${R I U}^{- 1}$ )	Peak Value
Structure 1	6.06	606	34.653	17.488	0.0325
Structure 2	6.13	613	17.488	36.029	0.1256
Structure 3	6.07	617	13.682	55.086	$1.976 \times 10^{- 4}$
Structure 4	9.10	910	10.644	85.494	$1.994 \times 10^{- 6}$

Sucrose Concentration	Refractive Index	Sucrose Concentration	Refractive Index
0%	1.339	50%	1.416
10%	1.350	60%	1.432
20%	1.363	70%	1.448
30%	1.383	80%	1.465
40%	1.398	90%	1.481

Device Structure	Stacking of Layers
Structure 1	BK7 prim/Ag layer/Ag grating
Structure 2	$B K 7 {p r i m / S i O}_{2} l a y e r / {S i O}_{2} - A g g r a t i n g / A g l a y e r$
Structure 3	$B K 7 {p r i m / g r a p h e n e / S i O}_{2} l a y e r / {S i O}_{2} - A g g r a t i n g / A g l a y e r$
Structure 4	$B K 7 {p r i m / g r a p h e n e / S i O}_{2} l a y e r / {S i O}_{2} - A g g r a t i n g / A g l a y e r / {M o S}_{2} l a y e r$

Device Structure	$Δ λ$ (nm)	Sensitivity (nm· ${R I U}^{- 1}$ )	FWHM (nm)	FOM ( ${R I U}^{- 1}$ )	Peak Value
Structure 1	6.06	606	34.653	17.488	0.0325
Structure 2	6.13	613	17.488	36.029	0.1256
Structure 3	6.07	617	13.682	55.086	$1.976 \times 10^{- 4}$
Structure 4	9.10	910	10.644	85.494	$1.994 \times 10^{- 6}$

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Equations (7)

Applied Optics