A theoretical analysis on sensitivity improvement of an SPR refractive index sensor with graphene and barium titanate nanosheets

Pal, Amrindra; Jha, Ankit

doi:10.1016/j.ijleo.2021.166378

Cited by 85 publications

(20 citation statements)

References 35 publications

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“…To excite the SPs at the metal-dielectric interface, a coupling prism is preferred to excite the momentum of input TM or P polarized radiation to match the momentum of surface plasmon wave (SPW) [10]. Achieving this condition of phase matching between Surface plasmon wave vector (SPWV) and Evanescent wave vector (EWV) of input wave [11], the maximum energy shifts from input wave to SPW [8], [9]. A sharp dip in the resonance curve is experienced at the resonance condition concerning the sensor's dielectric and metal layer properties [12].…”

Section: Introductionmentioning

confidence: 99%

“…Gan et al suggested a sensor design using silver as a metal layer and franckeite as 2-D material and reported the sensitivity of 188°/𝑅𝐼𝑈 [28]. Pal and Jha implemented an SPR based sensor with barium titanate as 2D material with a bi-metallic silver layer, and sensitivity 280°/𝑅𝐼𝑈 is obtained [11]. Srivastava and Prajapati demonstrated a new sensor design using silicon, blue phosphorene, MoS2 hybrid structure, and sensitivity 230.66°/ 𝑅𝐼𝑈 is found [29].…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity enhancement of a graphene, zinc sulfide-based surface plasmon resonance biosensor with an Ag metal configuration in the visible region

et al. 2022

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A biosensor based on the modified Kretschmann configuration is proposed here. The sensitivity of the conventional prism-based sensor using angular interrogation is low. To enhance the sensor's performance, layers of zinc sulfide (ZnS) and graphene have been deposited over the metal layer. The angular interrogation technique is used to analyze the performance of the sensor. The thickness of the Ag metal has been optimized. The thickness of the Ag metal is taken as 50 nm because minimum reflectance has been achieved. With the combinations of the four layers of ZnS and one graphene layer, the maximum sensitivity attained is 305°/𝑅𝐼𝑈.Performance parameters such as detection accuracy, FWHM, and quality factor of the sensor have been evaluated as obtained as 0.33 𝑑𝑒𝑔 −1 , 3.05 𝑑𝑒𝑔, 100.7 𝑅𝐼𝑈 −1 , respectively. The proposed sensor has potential application in the field of biochemical and biological analyte detection.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensitivity enhancement of a graphene, zinc sulfide-based surface plasmon resonance biosensor with an Ag metal configuration in the visible region

et al. 2022

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“…For the resonance phenomenon to occur, there must be an equilibrium between EWV and SPWV [14]. Different works based on SPR biosensing using prism [15], fiber optic [16], and grating coupled [17] have been presented in the past few decades. The sensitivity offered by prism-coupled SPR sensors is better and gives high stability.…”

Section: Introductionmentioning

confidence: 99%

Monitoring hemoglobin levels in human blood samples using an MXene-ZnO-graphene based Surface plasmon resonance biosensor

Manavalan

Kuppusamy

Uniyal

et al. 2022

Preprint

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The main aim of our present study is to propose a surface plasmon resonance-based biosensor design for hemoglobin concentration monitoring in human blood samples. The proposed SPR sensor is based upon the Kretschmann configuration with silver metal, MXene, ZnO, and graphene nanolayers, with a BK7 coupling prism. A He-Ne laser optical input source with a 633 nm wavelength is used following the attenuated total reflection (ATR) principle. After employing the MXene, ZnO, and graphene layers over the conventional sensor setup, an investigation is done. With the optimized structure, our main aim is to detect the presence of hemoglobin concentration in the human blood with its refractive index variation. The calculated highest sensitivity of the proposed configuration is 154 \(Degree/RIU\) with the other parameters calculated as FWHM near \(3.69 Degree\), SNR of 0.5051 \({\text{D}\text{e}\text{g}\text{r}\text{e}\text{e}}^{-1}\) and quality factor of 41.58 \({RIU}^{-1}\).

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“…Hence graphene can be used as protective layer against oxidation of metals which is also found to improve the sensitivity of the sensor to a great extend [33]. Recent, SPR biosensor based on Blue P-TMDC-graphene hetero structure [34], graphene-BaTiO3 nanosheets [35] have also been proposed.…”

Section: Introductionmentioning

confidence: 99%

Platinum Layers Sandwiched Between Black Phosphorous and Graphene for Enhanced SPR Sensor Performance

Maheswari¹,

Santhanakumar²,

Veeran³

et al. 2021

Plasmonics

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Highly sensitivity Surface Plasmon resonance (SPR) sensor consisting of Ag-Pt bimetallic films sandwiched with 2D materials Black Phosphorus (BP) and Graphene over Pt layer in Kretschmann configuration is analyzed theoretically using the Transfer Matrix Method.Numerical results shows that upon suitable optimization of thickness of Ag-Pt and number of layers of BP & graphene, sensitivity as high as 412º/RIU can be achieved for p-polarized light of wavelength 633 nm. This performance can be tuned and controlled by changing the number of layers of BP and graphene. Further, the addition of graphene and heterostructures of black phosphorus not only improved the sensitivity of the sensor but keep the FWHM of the resonance curve much smaller than the conventional sensor utilizing Au as plasmon metal and hence improved the resolution to a significant extent. We expect that this new proposed design will be useful for medical diagnosis, biomolecular detection and chemical examination.

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A theoretical analysis on sensitivity improvement of an SPR refractive index sensor with graphene and barium titanate nanosheets

Cited by 85 publications

References 35 publications

Sensitivity enhancement of a graphene, zinc sulfide-based surface plasmon resonance biosensor with an Ag metal configuration in the visible region

Sensitivity enhancement of a graphene, zinc sulfide-based surface plasmon resonance biosensor with an Ag metal configuration in the visible region

Monitoring hemoglobin levels in human blood samples using an MXene-ZnO-graphene based Surface plasmon resonance biosensor

Platinum Layers Sandwiched Between Black Phosphorous and Graphene for Enhanced SPR Sensor Performance

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