Sensitivity Enhancement in Surface Plasmon Resonance Biochemical Sensor Based on Transition Metal Dichalcogenides/Graphene Heterostructure

Zhao, Xiang; Huang, Tianye; Shum, Ping; Wu, Xu; Huang, P. M.; Pan, Jianxing; Wu, Yiheng; Cheng, Zhuo

doi:10.3390/s18072056

Cited by 78 publications

(25 citation statements)

References 31 publications

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“…26 The advantage of using such a scheme is that the polarization response of the con¯guration can also be investigated if needed. It should be pointed out that prisms of other shapes, such as triangular 27 and half-cylinder, 28 can also be used. The structure parameters are set as follows: the thickness of the G layer d g ¼ 0:34 nm and its optical refractive index n g ¼ 3 þ iC 1 /3, where C 1 ¼ 5:446 m À1 , 3 the refractive indexes of B and C layers are respectively n b ¼ 3:48 and n c ¼ 1, and the bu®er layer E is a low-index layer with a refractive index n e ¼ 1.…”

Section: Resultsmentioning

confidence: 99%

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Jin

Zhou

Lai

2020

J. Innov. Opt. Health Sci.

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Graphene derivatives, possessing strong Raman scattering and near-infrared absorption intrinsically, have boosted many exciting biosensing applications. The tunability of the absorption characteristics, however, remains largely unexplored to date. Here, we proposed a multilayer configuration constructed by a graphene monolayer sandwiched between a buffer layer and one-dimensional photonic crystal (1DPC) to achieve tunable graphene absorption under total internal reflection (TIR). It is interesting that the unique optical properties of the buffer-graphene-1DPC multilayer structure, the electromagnetically induced transparency (EIT)-like and Fano-like absorptions, can be achieved with pre-determined resonance wavelengths, and furtherly be tuned by adjusting either the structure parameters or the incident angle of light. Theoretical analyses demonstrate that such EIT- and Fano-like absorptions are due to the interference of light in the multilayer structure and the complete transmission produced by the evanescent wave resonance in the configuration. The enhanced absorptions and the huge electrical field enhancement effect exhibit potentials for broad applications, such as photoacoustic imaging and Raman imaging.

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Section: Resultsmentioning

confidence: 99%

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Jin

Zhou

Lai

2020

J. Innov. Opt. Health Sci.

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“…The fifth layer of TMDCs with the refractive index and thickness of monolayer at λ = 632.8 nm is shown in Table 1 [47,48]. In the sixth layer, the refractive index of graphene at visible range is obtained by the relation [49]:…”

Section: Theoretical Model and Methodsmentioning

confidence: 99%

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

Han

Pan

et al. 2020

Sensors

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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.

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“…They insisted on the use of graphene for sensing application where high sensitivity and high resolution was required. Zhao et al proposed a highly sensitive SPR biochemical sensor which utilized a heterostructure of transition metal dichalcogenides (TMDC) and graphene [19]. They achieved an angular sensitivity of 315.5 ο /RIU for 36 nm aluminium thin film and 7 layers of WS 2 .…”

Section: Introductionmentioning

confidence: 99%

“…They achieved the maximum sensitivity of 85.375% for bilayers of TiO 2 and SiO 2 . This showed that till today, a large number of researchers investigated the highly sensitive graphene based SPR biosensor, where metals had been used for SPs generation [18][19][20][21][22]. Very few of them focused on enhancing other parameters like DA and FOM for the accurate detection of biomolecules [21].…”

Section: Introductionmentioning

confidence: 99%

Figure of Merit Enhancement of Surface Plasmon Resonance Biosensor Using Ga-Doped Zinc Oxide in Near Infrared Range

Pal

Verma²,

Prajapati

et al. 2020

Photonic Sens

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This work presents a surface plasmon resonance biosensor for the figure of merit enhancement by using Ga-doped zinc oxide (GZO), i.e., nanostructured transparent conducting oxide as plasmonic material in place of metal at the telecommunication wavelength. Two-dimentional graphene is used here as a biorecognition element (BRE) layer for stable and robust adsorption of biomolecules. This is possible due to stronger van der Waals forces between graphene's hexagonal cells and carbon-like ring arrangement present in biomolecules. The proposed sensor shows improved biosensing due to fascinating electronic, optical, physical, and chemical properties of graphene. This work analyses the sensitivity, detection accuracy, and figure of merit for the GZO/graphene SPR sensor on using the dielectric layer in between the prism and GZO. The highest figure of merit of 366.7 RIU − 1 is achieved for the proposed SPR biosensor on using the nanostructured GZO at the 3000 nm dielectric thickness. The proposed SPR biosensor can be used practically for sensing of larger size biomolecules with due availability of advanced techniques for the fabrication of the nanostructured GZO and graphene.

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Sensitivity Enhancement in Surface Plasmon Resonance Biochemical Sensor Based on Transition Metal Dichalcogenides/Graphene Heterostructure

Cited by 78 publications

References 31 publications

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Tunable absorption characteristics in multilayered structures with graphene for biosensing

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

Figure of Merit Enhancement of Surface Plasmon Resonance Biosensor Using Ga-Doped Zinc Oxide in Near Infrared Range

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