Enhanced Mach-Zehnder Interferometer Multimode–Single-Mode–Multimode Fiber Optic Refractive Index Sensor Based on Surface Plasmon Resonance

In this paper, an all-fiber Mach-Zehnder interferometer (MZI) sensor for refractive index (RI) measuring is presented, which is based on Multimode–Single-mode–Multimode (MSM) fiber. The effects of both reducing the radius of the sensing part and the surface plasmon resonance (SPR) on its efficiency are investigated. Increasing the interaction of high-order modes with external media, caused by etching the cladding layer of the single-mode fiber part, significantly improves the sensitivity. Both wavelength and intensity interrogation approaches are employed to study the Multimode–etched Single-mode–Multimode (MESM) fiber sensor. The intensity and the wavelength sensitivities for the RI measurement in the range of 1.428-1.458 are obtained as -2308.92 %/RIU and 1313.14 nm/RIU, respectively. Finally, the MESM-SPR sensor is proposed and characterized. Results exhibit high performance in the RI range of 1.333 to 1.357, in which the sensitivity of 1433 nm/RIU is achieved. The advantages like low cost, high sensitivity, and simple fabrication methods make these sensors promising devices for chemical, food industry, and biosensing applications.

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Tapered single-mode optical fiber-based on localized surface plasmon resonance as refractive index sensor

Journal of Physics Conference Series ◽

10.1088/1742-6596/1371/1/012017 ◽

2019 ◽

Vol 1371 ◽

pp. 012017

Author(s):

Nurfatin Musa ◽

Hazri Bakhtiar ◽

Ganesan Krishnan ◽

Harith Ahmad ◽

Sulaiman Wadi Harun ◽

...

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Optical Fiber ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Localized Surface Plasmon Resonance ◽

Single Mode ◽

Localized Surface Plasmon ◽

Refractive Index Sensor ◽

Single Mode Optical Fiber

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Numerical design of high-performance WS2/metal/WS2/graphene heterostructure based surface plasmon resonance refractive index sensor

Results in Physics ◽

10.1016/j.rinp.2021.104021 ◽

2021 ◽

Vol 23 ◽

pp. 104021

Author(s):

Biswajit Dey ◽

Md. Sherajul Islam ◽

Jeongwon Park

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

High Performance ◽

Refractive Index Sensor ◽

Numerical Design

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Low-cost surface plasmon resonance refractive index sensor based on the metal grating in DVD-ROM disc

Sensors and Actuators A Physical ◽

10.1016/j.sna.2021.112858 ◽

2021 ◽

pp. 112858

Author(s):

Wei Su ◽

Yinlong Luo ◽

Yimin Ding ◽

Jian Wu

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Low Cost ◽

Refractive Index Sensor ◽

Metal Grating ◽

Cost Surface

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The Simulation of a Surface Plasmon Resonance Metallic Grating for Maximizing THz Sensitivity in Refractive Index Sensor Application

International Journal of Optics ◽

10.1155/2020/3138725 ◽

2020 ◽

Vol 2020 ◽

pp. 1-8

Author(s):

Asmar Sathukarn ◽

Chia Jia yi ◽

Sakoolkan Boonruang ◽

Mati Horprathum ◽

Khwanchai Tantiwanichapan ◽

...

Keyword(s):

Refractive Index ◽

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

Low Cost ◽

High Sensitivity ◽

Grating Period ◽

Mass Scale ◽

Refractive Index Sensor ◽

Terahertz Time Domain Spectroscopy

Nowadays, the simplicity of both designing and fabrication process of a terahertz (THz) resonator-based sensing technique leads to its ongoing development. The consumable THz resonator needs to be easily integrated into an existing terahertz time domain spectroscopy (THz TDS) measurement system. It should also be able to be fabricated in a mass scale with a low production cost. In this work, a metal-coated surface plasmon resonance- (SPR-) based sensor is simulated and designed as a low-cost refractive index sensor utilizing rigorous coupled wave analysis (RCWA). To demonstrate our methodology, we design a gold-coated grating with a polydimethylsiloxane (PDMS) as a substrate, in order to perform quantitative analysis of gasoline-toluene mixture composition, which has a refraction index variation of 0.1 at THz frequency. The grating period is tuned such that its surface plasmon resonance (SPR) frequency matches with the peak frequency of the THz TDS system. Moreover, other grating parameters, i.e., a filling factor and a grating depth, are optimized to increase the sensor sensitivity and sharpen the resonance dip. High sensitivity up to 500 GHz/RIU with a refractive index resolution up to 0.01 is numerically revealed. The H-field of the designed grating is then evaluated to indicate a strong SPR excitation. The well-developed designed grating introduces a promising, low-cost, and easily fabricated THz refractive index sensor.

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