Effect of zinc oxide overlayer on the sensitivity of fiber optic SPR sensor with indium tin oxide layer

Kapoor, Vicky; Sharma, Navneet K.; Sajal, Vivek

doi:10.1016/j.ijleo.2019.03.122

Cited by 15 publications

(5 citation statements)

References 30 publications

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“…To overcome these limitations, an overlayer of metal or metal oxide or metal chalcogenide is highly required in Ag‐based plasmonic devices 10,21 . Thin layer of metal oxides/metal sulfides such as ITO, ZnO, SnO 2 , and ZnS over Ag layer not only guards the Ag layer from getting oxidized but also advances the sensitivity of Ag‐based SPR configurations 15,21–24 . Recently, tin oxide (SnO 2 ) having rutile structure shows useful nature as an n‐type semiconducting material with direct band gap of 3.65 eV at 300 K. SnO 2 is chemically as well as mechanically stable.…”

Section: Introductionmentioning

confidence: 99%

“…10,21 Thin layer of metal oxides/metal sulfides such as ITO, ZnO, SnO 2 , and ZnS over Ag layer not only guards the Ag layer from getting oxidized but also advances the sensitivity of Ag-based SPR configurations. 15,[21][22][23][24] Recently, tin oxide (SnO 2 ) having rutile structure shows useful nature as an n-type semiconducting material with direct band gap of 3.65 eV at 300 K. SnO 2 is chemically as well as mechanically stable. Its thin films display many potential applications like gas sensors, solar cells, photocatalysis, transparent conducting oxide in display devices, and optoelectronic devices.…”

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confidence: 99%

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Surface plasmon resonance‐based fiber optic sensor utilizing tin oxide and zinc sulfide: An experimental analysis

Kapoor,

Sharma

2024

Surface & Interface Analysis

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Surface plasmon resonance‐based fiber optic sensors with Ag‐SnO2 and Ag‐ZnS bi‐layers are proposed experimentally and compared in detail in terms of sensitivity. Effect of SnO2 and ZnS layer thicknesses on the sensitivity is examined. Largest sensitivities are achieved by sensors with 40 nm Ag‐10 nm SnO2 layers and 40 nm Ag‐10 nm ZnS layers. Sensor with 40 nm Ag‐10 nm SnO2 layers is found to demonstrate better sensitivity than that with 40 nm Ag‐10 nm ZnS layers.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Surface plasmon resonance‐based fiber optic sensor utilizing tin oxide and zinc sulfide: An experimental analysis

Kapoor,

Sharma

2024

Surface & Interface Analysis

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“…Sensor characteristics such as sensitivity, detection accuracy, figure of merit and etc. can be calculated by examining the power transmission spectrum [ 14 ].…”

Section: Introductionmentioning

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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“…created a six-fold enhancement in sensitivity using periodic metallic structures [6]. Kapoor et al found a SPR sensor with 40 nm ITO and 15 nm ZnO could obtain the sensitivity up to 1620 nm/RIU [7]. Wang et al achieved 2459.3 nm/RIU by coating WS 2 on an Au-based SPR sensor, whose sensitivity increased by 26.6% compared to the conventional Au-based sensor [8].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study

Lin

Chen

Lin

2020

Sensors

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In this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS2, WS2 and WSe2) hybrid structure, and theoretically investigate its sensitivity improvement in the visible region. The thickness of metal (Au, Ag or Cu) and the layer number of each 2D material are optimized using genetic algorithms to obtain the highest sensitivity for a specific wavelength of incident light. Then, the sensitivities of proposed SPR sensors with different metal films at various wavelengths are compared. An Ag-based SPR sensor exhibits a higher sensitivity than an Au- or Cu-based one at most wavelengths in the visible region. In addition, the sensitivity of the proposed SPR sensor varies obviously with the wavelength of incident light, and shows a maximum value of 159, 194 or 155°/RIU for Au, Ag or Cu, respectively. It is demonstrated that the sensitivity of the SPR sensor based on 2D materials’ hybrid structure can be further improved by optimizing the wavelength of incident light.

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Effect of zinc oxide overlayer on the sensitivity of fiber optic SPR sensor with indium tin oxide layer

Cited by 15 publications

References 30 publications

Surface plasmon resonance‐based fiber optic sensor utilizing tin oxide and zinc sulfide: An experimental analysis

Surface plasmon resonance‐based fiber optic sensor utilizing tin oxide and zinc sulfide: An experimental analysis

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

Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study

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