Numerical investigation of gold plated single-core photonic crystal fiber-based refractive index sensor

2021 ◽  
Author(s):  
Monika Kiroriwal ◽  
Poonam Singal
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Refractive Index Sensor ◽  
Geometrical Parameters ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Simple Geometry ◽  
Bio Imaging ◽  
Index Sensitivity

Surface plasmon resonance (SPR)-based single-core photonic crystal fiber (PCF) biosensor is investigated with external gold coating. All the geometrical parameters such as a gold layer, an analyte layer, a lattice period and cladding air holes are optimized to enhance the sensing ability of the sensor by introducing the finite element method. The designed sensor is able to achieve the highest amplitude sensitivity (AS) of 2258.95 RIU[Formula: see text] with an acceptable refractive index sensitivity (RIS) of 6000 nm/RIU over the analyte refractive index (ARI) span of 1.31–1.40. This sensor can detect a slight index alteration in the sensing medium using a resolution of [Formula: see text] and a high figure of merit (FOM) of 79.01. With the enhanced modal behavior with simple geometry, the resulting sensor can be suitable for real-time monitoring in biological, biochemical and bio-imaging applications.

Photonic Crystal Fiber Mach-Zehnder Interferometer Based on Refractive Index Sensitivity of Cladding Corrosion Optimization

2019 ◽  
Vol 56 (17) ◽  
pp. 170629
Author(s):  
黄国家 Guojia Huang ◽  
马诗章 Shizhang Ma ◽  
王恋 Lian Wang ◽  
李仕平 Shiping Li ◽  
冯文林 Wenlin Feng
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Zehnder Interferometer ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Index Sensitivity ◽  
Mach Zehnder Interferometer

scholarly journals Research on Fused Tapered Photonic Crystal Fiber Sensor Based on the Method of Intermittent Cooling

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Guangwei Fu ◽  
Xinghu Fu ◽  
Peng Guo ◽  
Yushen Ji ◽  
Weihong Bi
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Glycerol Solution ◽  
Transmission Spectra ◽  
Refractive Index Sensitivity ◽  
Fringe Contrast ◽  
Crystal Fiber ◽  
Heating And Cooling ◽  
Index Sensitivity

Based on the intermittent cooling method, a fused tapered Photonic Crystal Fiber (PCF) interferometer is proposed. In the process of tapering, stop heating and wait for cooling at different taper length. Repeat heating and cooling, until taper goes to the expected length. Compared with the ordinary fused tapered method, the fringe contrast of the transmission spectra of this sensor is 15.06 dB. The transmission spectra in different concentrations of glycerol solution are obtained, and the temperature cross-sensitivity of the sensor is studied. The experimental results show that as the external refractive index increases, the transmission spectra of the sensor shift to longer wavelength. In the measuring glycerol solution, the refractive index sensitivity of the sensor can achieve 797.674 nm/RIU, and the temperature sensitivity is only 0.00125 nm/°C.

scholarly journals A Highly Sensitive Refractive Index Sensor Based on a V-Shaped Photonic Crystal Fiber with a High Refractive Index Range

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3782
Author(s):  
Xin Yan ◽  
Rao Fu ◽  
Tonglei Cheng ◽  
Shuguang Li
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
High Refractive Index ◽  
Refractive Index Sensor ◽  
Chemical Production ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Sensing Applications ◽  
Highly Sensitive

This paper proposes a highly sensitive surface plasmon resonance (SPR) refractive index sensor based on the photonic crystal fiber (PCF). The optical properties of the PCF are investigated by modulating the refractive index of a liquid analyte. The finite element method (FEM) is used to calculate and analyze the PCF structure. After optimization, the fiber can achieve high linearity of 0.9931 and an average refractive index sensitivity of up to 14,771.4 nm/RIU over a refractive index range from 1.47 to 1.52, with the maximum wavelength sensitivity of 18,000.5 nm/RIU. The proposed structure can be used in various sensing applications, including biological monitoring, environmental monitoring, and chemical production with the modification and analysis of the proposed structure.

Sensitive Near-Infrared Refractive Index Sensors Based on D-Shaped Photonic Crystal Fibers

2021 ◽  
Vol 21 (11) ◽  
pp. 5535-5541
Author(s):  
Thu Trang Hoang ◽  
Van Dai Pham ◽  
Thanh Son Pham ◽  
Khai Q. Le ◽  
Quang Minh Ngo
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Near Infrared ◽  
Plasmonic Sensor ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Refractive Index Sensors ◽  
Index Sensitivity ◽  
Index Unit

We report a numerical study of D-shaped photonic crystal fiber based plasmonic refractive index sensor with high resolution and sensitivity in the near-infrared region. D-shaped photonic crystal fiber is formed by side polishing one part of photonic crystal fiber. It has a polishing surface where plasmonic gold layer is coated to modulate the resonant wavelength and enhance the refractive index sensitivity. Several D-shaped photonic crystal fiber plasmonic sensors with various distances from the photonic crystal fiber’s core to the polishing surface and gold thicknesses are designed and their characteristics are analyzed by the finite element method. The simulation results indicate that distance from the photonic crystal fiber’s core to the polishing surface causes modifications in the loss intensity, the resonant wavelength, and the refractive index sensitivity of D-shaped photonic crystal fiber plasmonic sensor. Mass production of refractive index sensors were achieved using a simple fabrication process, whereby the D-shaped photonic crystal fiber is grinded where distance from the photonic crystal fiber’s core to the polishing surface is less than one layer thickness and then coated with the gold layer. For the refractive index sensing applications, the maxima theoretical resolution and sensitivity of D-shaped photonic crystal fiber plasmonic sensor reach 2.98 × 10 6refractive index unit and 6,140 nm/refractive index unit in range of 1.30–1.37, respectively. We also report an initial fabrication of the D-shaped photonic crystal fiber following the standard stack-and- draw method to demonstrate the feasibility of the proposed device by using our in-house equipments. The proposed D-shaped photonic crystal fiber plasmonic sensor design in this work would be useful for the development of cheap refractive index sensors with high sensitivity and resolution.

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