Theoretical analysis of surface plasmon resonance based fiber optic sensor using ITO and ZnO thin films

Shukla, Sarika; Sharma, Navneet K.; Sajal, Vivek

doi:10.1007/s11082-015-0351-7

Cited by 17 publications

(5 citation statements)

References 28 publications

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“…Previous studies have shown that the interaction between WO 2 nanoparticles and the polymer matrix may result in flaws in the structure and macrostrains connected to higher PVDF/PMMA's optical energy gap values [48]. The increase in the band gap's density of localized states is partly caused by disordered defects and by stresses of a very minor magnitude [49]. The energy gap increased with the increase of doping due to the extended localization arising from the poor crystallinity [50].…”

Section: Optical Propertiesmentioning

confidence: 99%

Preparation and Study the Properties of PVDF/PEO/WO2 Hybrid Nanocomposite Thin Films Prepared by a Spin Coating Method

Bardan,

Abbas

2024

IJP

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In this work, using the spin coating method to create polyvinylidene fluoride (PVDF)/polyethylene oxide (PEO) thin films, the effects of nano-tungsten oxide (WO2) doping were investigated. The novelty of this research lies in its investigation of varying weight concentrations of WO2 nanoparticles (NPs) within the composite films. Comprehensive characterization techniques were employed, including structural analysis via X-ray diffraction (XRD), which revealed a clear and prominent peak in the XRD of the PVDF/PEO films, and the films' polycrystalline nature with tetragonal structures. The grain size was noted to increase with higher WO2 NPs doping. Field emission scanning electron microscopy (FE-SEM) showed hexagonal-like α-phase PVDF crystals and uniform distribution of WO2 NPs. Furthermore, Fourier-transform infrared spectroscopy (FTIR) confirmed the characteristics of PVDF/PEO and identified specific doping compounds, confirming successful incorporation. The optical transmittance spectra unveiled the films' optical band gap energy, optical transition types, and absorption characteristics, where novelty emerged as the band gap energy significantly increased from 3.0 eV to 3.64 eV with an increased WO2 NPs weight doping percentage, signifying profound electronic structure modifications and potential applications in optoelectronics and sensors.

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Section: Optical Propertiesmentioning

confidence: 99%

Preparation and Study the Properties of PVDF/PEO/WO2 Hybrid Nanocomposite Thin Films Prepared by a Spin Coating Method

Bardan,

Abbas

2024

IJP

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“…The matrix method is used to calculate the p-polarization of the Fresnel reflection coefficient (Rp). The general expression for the normalized transmitted power for a fiber optic SPR sensor is given as follows [ 28 ] where θ is supposed as the angle of the ray with the normal to the core- cladding interface and θ c is the critical angle of the fiber and the refractive index of the fiber core. N ref (θ) indicates the number of light reflections in the fiber, which is defined as [ 29 ] where L and D are the length of the exposed region and the core diameter of the fiber, respectively.…”

Section: Basic Theorymentioning

confidence: 99%

Numerical Simulation of Surface Plasmon Resonance Optical Fiber Biosensor Enhanced by Using Alloys for Medical Application

Esmailidastjerdipour

Shahshahani

2023

Sens Imaging

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Tuberculosis is a very dangerous disease. Therefore, early and quick diagnosis of this disease can increase the chances of overcoming it. Studies show that people with tuberculosis have a lower blood plasma refractive index than healthy people. The performance of the fiber optic sensor based on surface plasmon resonance is investigated for the metal/oxide/graphene structure and for cases where the diameter of the fiber optic core is 300, 600, and 940 µm while blood plasma is considered as the sensing medium. The sensor characteristics such as sensitivity, detection accuracy and figure of merit are simulated for each structure using the theory of matrix method in Wolfram Mathematica software. The simulation results show that the aluminum/lutetium oxide/graphene structure has the highest quality factor when the core diameter of the optical fiber is 940 µm. In continuation of this research, the effects of using alloys with different mixture proportions to improve the quality are investigated. According to results, the structure of aluminum/copper alloy (with a ratio of 30/70)–lutetium oxide graphene is the best choice for improving the quality of the sensor.

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“…In the present study, various solutions of glycerin in water with concentrations that provide a refractive index change from 1.33 to 1.37 are considered to be the analytes 36 . The sensitivities are calculated by data fitting.…”

Section: Theorymentioning

confidence: 99%

“…In the present study, various solutions of glycerin in water with concentrations that provide a refractive index change from 1.33 to 1.37 are considered to be the analytes. 36 The sensitivities are calculated by data fitting. First, the values of λ res and λ sens corresponding to different refractive indices of the analyte are detected.…”

Section: Sensor Sensitivitymentioning

confidence: 99%

Highly sensitive self-referenced surface plasmon resonance fiber optic sensor with indium tin oxide/metal/dielectric structure

Zhang

Lin

2023

Opt. Eng.

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A highly sensitive self-referenced surface plasmon resonance (SPR) fiber optic sensor with an indium tin oxide (ITO)/metal/dielectric structure is proposed and theoretically analyzed using the transfer matrix method-based numerical simulations. First, the thicknesses of the metal and ITO films are optimized to realize self-referenced sensing with low normalized transmission power at the resonance peak. Then, a thickness-optimized dielectric (TiO 2 ) film is employed on top of the metal film to improve the sensitivity of the proposed self-referenced sensor. In addition, a comparison between the traditional self-referenced sensor and the proposed self-referenced sensor with the dielectric film are carried out. The self-referenced sensor with a 36 nm ITO/37 nm Ag/70 nm TiO 2 structure obtains up to 14510 nm/RIU in sensing sensitivity when the refractive index of the analyte varies from 1.33 to 1.37, which is improved by 421% compared with the traditional one without the dielectric. At the same time, the shift of the self-referenced resonance wavelength changes little for the proposed structure. The proposed ITO/metal/dielectric structurebased fiber optic sensor exhibits highly sensitively self-referenced sensing performance in the near infrared band, which can promote its application in the field of biosensors.

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Theoretical analysis of surface plasmon resonance based fiber optic sensor using ITO and ZnO thin films

Cited by 17 publications

References 28 publications

Preparation and Study the Properties of PVDF/PEO/WO2 Hybrid Nanocomposite Thin Films Prepared by a Spin Coating Method

Preparation and Study the Properties of PVDF/PEO/WO2 Hybrid Nanocomposite Thin Films Prepared by a Spin Coating Method

Numerical Simulation of Surface Plasmon Resonance Optical Fiber Biosensor Enhanced by Using Alloys for Medical Application

Highly sensitive self-referenced surface plasmon resonance fiber optic sensor with indium tin oxide/metal/dielectric structure

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