Side-core holey fiber based plasmonic sensor

2013 ◽  
Author(s):  
Ya Han ◽  
Li Xia ◽  
Deming Liu
Keyword(s):  
Plasmonic Sensor ◽  
Holey Fiber

A NEW RESONANT COUPLING BETWEEN AN ANALYTE-FILLED CORE MODE AND A SUPERMODE OF A MULTI-CORE HOLEY FIBER BASED PLASMONIC SENSOR

2012 ◽  
Vol 26 (31) ◽  
pp. 1250207 ◽  
Author(s):  
V. A. POPESCU
Keyword(s):  
Signal To Noise Ratio ◽  
Infrared Region ◽  
Phase Matching ◽  
Core Mode ◽  
Plasmonic Sensor ◽  
Holey Fiber ◽  
Resonant Coupling ◽  
High Degree ◽  
Very High ◽  
Better Than

A new resonant coupling between an analyte-filled core mode and a supermode in a multi-core holey fiber recently designed for sensing of benzene is investigated using a finite element method. The dominant electric field of the fundamental core supermode is in a high degree extended at this resonance from the hexagonal solid cores to the analyte (benzene) layer and vice versa for the analyte-filled fundamental core mode. The full width at half maximum (FWHM) bandwidth for the fundamental supermode is 5.3 nm. When the analyte refractive index is increased by 0.001 RIU, the phase matching point is shifted by 4.5 nm toward longer wavelengths, with a corresponding sensitivity better than 2.2 × 10-5 RIU and a very high value of the signal-to-noise ratio (0.85). The resonance of a fundamental supermode with the first order of surface plasmon resonance mode in the infrared region (λ = 1.33825 μ m ) can be used together with a resonant coupling between a fundamental supermode with an analyte fundamental mode in visible (λ = 0.6415 μ m ) part of the spectrum for increasing the performance of the sensor.

A VERY HIGH AMPLITUDE SENSITIVITY OF A NEW MULTI-CORE HOLEY FIBER-BASED PLASMONIC SENSOR

2013 ◽  
Vol 27 (06) ◽  
pp. 1350038 ◽  
Author(s):  
V. A. POPESCU
Keyword(s):  
Transmission Loss ◽  
Signal To Noise Ratio ◽  
Water Layer ◽  
High Amplitude ◽  
Plasmon Mode ◽  
Plasmonic Sensor ◽  
Holey Fiber ◽  
Resonant Coupling ◽  
Group Refractive Index ◽  
Better Than

The propagation characteristics in a new multi-core holey fiber-based plasmonic sensor are investigated using a finite element method. The fiber is made by a silica core with a small air hole in the center of the structure, surrounded by six air holes placed at the vertices of a hexagon, two layers of air holes arranged in a hexagonal way that are inserted in the SiO 2 core which is surrounded by a gold layer and a very thick distilled water layer. The structure is designed to have high amplitude sensitivity near the phase matching point corresponding to the maximum of the power fraction for a core guided supermode in the water and gold layers. The maximum of the imaginary part of the group refractive index is located to the same wavelength as the maximum of the amplitude sensitivity. The advantages of our design are a small value of FWHM parameter, a high value of the signal-to-noise ratio, a high value of the amplitude sensitivity (4040.9 RIU-1), a sensor resolution better than 2.5 × 10-6 RIU and a strong transmission loss of a core guided supermode at the resonant coupling due to efficient interaction with a plasmon mode.

scholarly journals A multi-core holey fiber based plasmonic sensor with large detection range and high linearity

2012 ◽  
Vol 20 (6) ◽  
pp. 5974 ◽  
Author(s):  
Binbin Shuai ◽  
Li Xia ◽  
Yating Zhang ◽  
Deming Liu
Keyword(s):  
Plasmonic Sensor ◽  
Detection Range ◽  
Holey Fiber ◽  
High Linearity

scholarly journals High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1164
Author(s):  
Gongli Xiao ◽  
Yanping Xu ◽  
Hongyan Yang ◽  
Zetao Ou ◽  
Jianyun Chen ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Figure Of Merit ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Multimode Interference ◽  
Geometrical Parameters ◽  
The Finite Element Method ◽  
Plasmonic Sensor ◽  
Coupled Mode ◽  
Plasmonic Nanosensor

Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 105. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.

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