scholarly journals Polymer Waveguide Coupled Surface Plasmon Refractive Index Sensor: A Theoretical Study

2020 ◽  
Vol 10 (4) ◽  
pp. 353-363
Author(s):  
Lanting Ji ◽  
Shuqing Yang ◽  
Rongna Shi ◽  
Yujie Fu ◽  
Juan Su ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon ◽  
Low Cost ◽  
High Refractive Index ◽  
Waveguide Layer ◽  
Polymer Materials ◽  
Refractive Index Sensor ◽  
Polymer Waveguide ◽  
Compact Size ◽  
Potential Applications

Abstract A waveguide coupled surface plasmon sensor for detection of liquid with high refractive index (RI) is designed based on polymer materials. The effects of variation of the thickness of the Au film, polymethyl methacrylate (PMMA) buffer, and waveguide layer on the sensing performance of the waveguide are comprehensively investigated by using the finite difference method. Numerical simulations show that a thinner gold film gives rise to a more sensitive structure, while the variation of the thickness of the PMMA buffer and waveguide layer has a little effect on the sensitivity. For liquid with high RI, the sensitivity of the sensor increases significantly. When RI of liquid to be measured increases from 1.45 to 1.52, the sensitivity is as high as 4518.14nm/RIU, and a high figure of merit of 114.07 is obtained. The waveguide coupled surface plasmon RI sensor shows potential applications in the fields of environment, industry, and agriculture sensing with the merits of compact size, low cost, and high integration density.

scholarly journals Refractive Index Sensor Based on Metal-Clad Planar Polymer Waveguide Operating at 850 nm

2020 ◽  
Author(s):  
Lanting Ji ◽  
Wei Wei ◽  
Gang Li ◽  
Shuqing Yang ◽  
Yujie Fu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Buffer Layer ◽  
Layer Thickness ◽  
Low Cost ◽  
Water Environment ◽  
Polymer Materials ◽  
Refractive Index Sensor ◽  
Polymer Waveguide ◽  
Waveguide Width ◽  
Wide Range

Abstract A metal-clad planar polymer waveguide refractive index sensor based on epoxy (EPO) polymer materials by using light intensity interrogation at 850 nm is designed. The polymethyl methacrylate (PMMA) material is deployed as the low refractive index (RI) buffer layer in order to better couple the optical guided mode and the surface plasmon polaritons (SPP) mode for working in water environment. The effects of the gold film thickness, PMMA buffer layer thickness, waveguide layer thickness, waveguide width, and gold length on the sensor sensing characteristics have been comprehensively studied. Simulation results demonstrate that the normalized transmission increases quasi-linearly with the increment of RI of the analyte from 1.33 to 1.46. The sensitivity is 491.5 dB/RIU, corresponding to a high RI resolution of 2.6×10−9 RIU. The designed SPP-based optical waveguide sensor is low-cost, wide-range, and high-precision, and has a broad application prospect in biochemical sensing with merits of miniaturization, flexibility, and multiplexing.

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

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.

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

2021 ◽  
Author(s):  
Zahra Akbarpour ◽  
Vahid Ahmadi ◽  
Farzaneh Arabpour Roghabadi
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
High Performance ◽  
Low Cost ◽  
Single Mode ◽  
Zehnder Interferometer ◽  
Refractive Index Sensor ◽  
Mach Zehnder Interferometer

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.

Surface plasmon resonance refractive index sensor based on ultraviolet bleached polymer waveguide

2017 ◽  
Vol 244 ◽  
pp. 373-379 ◽  
Author(s):  
Lanting Ji ◽  
Xiaoqiang Sun ◽  
Guobing He ◽  
Yu Liu ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Refractive Index Sensor ◽  
Polymer Waveguide

Development and analysis of surface plasmon resonance based refractive index sensor for pregnancy testing

2021 ◽  
Vol 140 ◽  
pp. 106551
Author(s):  
Sumaiya Akhtar Mitu ◽  
Kawsar Ahmed ◽  
Fahad Ahmed Al Zahrani ◽  
Amit Grover ◽  
Murugan Senthil Mani Rajan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Refractive Index Sensor ◽  
Pregnancy Testing

A proposal of T-structure fiber-optic refractive index sensor based on surface plasmon resonance

2016 ◽  
Vol 369 ◽  
pp. 189-193 ◽  
Author(s):  
Xiao-Ming Wang ◽  
Chun-Liu Zhao ◽  
Yan-Ru Wang ◽  
Shangzhong Jin
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Fiber Optic ◽  
Refractive Index Sensor

scholarly journals Surface Plasmon Resonance Refractive Index Sensor Based on Active Photonic Crystal Fiber

2013 ◽  
Vol 5 (6) ◽  
pp. 4801108-4801108 ◽  
Author(s):  
C. J. Hao ◽  
Y. Lu ◽  
M. T. Wang ◽  
B. Q Wu ◽  
L. C. Duan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Refractive Index Sensor ◽  
Crystal Fiber
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