Sensitivity enhancement of surface plasmon resonance biosensor using graphene and air gap

Verma, Alka; Prakash, Arun; Tripathi, Rajeev

doi:10.1016/j.optcom.2015.08.076

Cited by 120 publications

(39 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 3 shows that inclusion of this air gap layer enhances both the sensitivity (70.90 • /RIU) and the CSF (372.8 RIU −1 ) compared to the case where no such air gap is used (sensitivity of 66.29 • /RIU and CSF of 285.0 RIU −1 ). References [27,28] also used an air gap layer which works as a dielectric medium and increases the resonance dip of the reflectivity curve. Table 3 also shows performances of the proposed sensor compared to the SPR sensor of [27] -both for the cases when air gap layer is present, and no air gap layer is there.…”

Section: Resultsmentioning

confidence: 99%

“…References [27,28] also used an air gap layer which works as a dielectric medium and increases the resonance dip of the reflectivity curve. Table 3 also shows performances of the proposed sensor compared to the SPR sensor of [27] -both for the cases when air gap layer is present, and no air gap layer is there. The proposed SPR sensor has excellent CSF of 372.8 RIU −1 in comparison with that of [27] which has the CSF of 200.0 RIU −1 .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Performance Enhancement of Ag-Au Bimetallic Surface Plasmon Resonance Biosensor Using Inp

Rouf¹,

Haque²

2018

PIER M

View full text Add to dashboard Cite

Performance improvement of couple silver (Ag)-gold (Au) based bimetallic surface plasmon resonance (SPR) sensor using a thin indium phosphide (InP) layer and an air gap layer is presented. Through detailed investigations quantitative insight into the dependence of different performance parameters including sensitivity factor (SF), sensor merit (SM), full width at half maximum (FWHM) and combined sensitivity factor (CSF) on stack structure, thickness and material parameters has been observed. Integration of thin InP layer on the metallic layer and inclusion of the air gap between glass prism and adsorption layer enhance both the sensitivity (70.90 • /RIU) and the CSF (372.8 RIU −1). Without InP layer the sensitivity is 65.66 • /RIU, and CSF is 178.5 RIU −1 whereas without the air gap the sensitivity is 66.29 • /RIU, and the CSF is 285.0 RIU −1. Compared to similar bimetallic SPR sensors that have been reported in recent literatures, sensitivity and overall figure of merit of the proposed sensor are far better. The presented biosensor's capability to detect the variation of 1/1000 of RIU of the sensing medium (corresponding to subtle concentration change of the analyte) has been demonstrated.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Performance Enhancement of Ag-Au Bimetallic Surface Plasmon Resonance Biosensor Using Inp

Rouf¹,

Haque²

2018

PIER M

View full text Add to dashboard Cite

show abstract

“…Since the first sensing application of SPR technique was reported in 1983 [2], numerous kinds of SPR sensors for physical, chemical, and biochemical sensing have been reported. The earliest SPR sensing devices are prism based [1,[3][4][5], which can realize extremely high resolution of 10 −6 RIU. But its bulky size and mechanical instability make it impossible for remote sensing and highly integrate.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Graphene-Based Photonic Crystal Fiber Sensor Using Birefringence and Surface Plasmon Resonance

et al. 2016

View full text Add to dashboard Cite

We present and numerically characterize a photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) sensor. By adjusting the air hole sizes of the PCF, the effective refractive index (RI) of core-guided mode can be tuned effectively and the sensor exhibits strong birefringence. Alternate holes coated with graphene-Ag bimetallic layers in the second layer are used as analyte channels, which can avoid adjacent interference and improve the signal to noise ratio (SNR). The graphene's good features can not only solve the problem of silver oxidation but also increase the absorption of molecules. We theoretically analyze the influence of the air hole sizes of the PCF and the thicknesses of graphene layer and Ag layer on the performance of the designed sensor using wavelength and amplitude interrogations. The wavelength sensitivity we obtained is as high as 2520 nm/RIU with the resolution of 3.97 × 10 −5 RIU, which can provide a reference for developing a high-sensitivity, real-time, fast-response, and distributed SPR sensor.

show abstract

“…These conditions are fulfilled using a variety of geometrical and material configurations [6]. Among them, we can mention the use of buffer layers [7][8][9], nanoparticles [10][11][12][13], or by coupling to a grating located at the interface [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

High-sensitivity integrated devices based on surface plasmon resonance for sensing applications

Elshorbagy¹,

Cuadrado²,

Alda³

2017

Photon. Res.

View full text Add to dashboard Cite

A metallic nanostructured array that scatters radiation toward a thin metallic layer generates surface plasmon resonances for normally incident light. The location of the minimum of the spectral reflectivity serves to detect changes in the index of refraction of the medium under analysis. The normal incidence operation eases its integration with optical fibers. The geometry of the arrangement and the material selection are changed to optimize some performance parameters as sensitivity, figure of merit, field enhancement, and spectral width. This optimization takes into account the feasibility of the fabrication. The evaluated results of sensitivity (1020 nm/RIU) and figure of merit (614 RIU −1 ) are competitive with those previously reported.

show abstract

Sensitivity enhancement of surface plasmon resonance biosensor using graphene and air gap

Cited by 120 publications

References 30 publications

Performance Enhancement of Ag-Au Bimetallic Surface Plasmon Resonance Biosensor Using Inp

Performance Enhancement of Ag-Au Bimetallic Surface Plasmon Resonance Biosensor Using Inp

Analysis of Graphene-Based Photonic Crystal Fiber Sensor Using Birefringence and Surface Plasmon Resonance

High-sensitivity integrated devices based on surface plasmon resonance for sensing applications

Contact Info

Product

Resources

About