A Dual-Channel Surface Plasmon Resonance Sensor Based on Dual-Polarized Photonic Crystal Fiber for Ultra-Wide Range and High Sensitivity of Refractive Index Detection

A Dual-Channel Surface Plasmon Resonance Sensor Based on Dual-Polarized Photonic Crystal Fiber for Ultra-Wide Range and High Sensitivity of Refractive Index Detection

A surface plasmon resonance sensor based on a dual-groove photonic crystal fiber (PCF) for refractive index (RI) sensing with ultra-wide measurement range and high sensitivity is designed and theoretically investigated. The upper and right grooves of the PCF as different sensing channels are coated...

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Bibliographic Details
Main Authors: Haoran Wang, Weiying Rao, Jian Luo, Hongyan Fu
Format: Article
Language:English
Published: IEEE 2021-01-01
Series:IEEE Photonics Journal
Subjects:
Refractive index
photonic crystal fiber
surface plasmon resonance
ultra-wide range
high-sensitivity
Online Access:https://ieeexplore.ieee.org/document/9336217/
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Summary:A surface plasmon resonance sensor based on a dual-groove photonic crystal fiber (PCF) for refractive index (RI) sensing with ultra-wide measurement range and high sensitivity is designed and theoretically investigated. The upper and right grooves of the PCF as different sensing channels are coated with Au or Au-TiO<sub>2</sub> compound film. The influence of the parameters on the sensing performance of the designed sensor are analyzed. Numerical results show that the maximum wavelength sensitivity (WS) of 6800&#x00A0;nm/RIU with a wavelength resolution of 1.47&#x00A0;&#x00D7; 10<sup>&#x2212;5</sup> RIU and maximum amplitude sensitivity (AS) of 5440 RIU<sup>&#x2212;1</sup> for the <italic>x</italic> polarization in the ultra-wide measurement range from 1.25 to 1.43 have been achieved. For <italic>y</italic> polarization, the proposed sensor has a maximum WS of 13200&#x00A0;nm/RIU and AS of 3465 RIU<sup>&#x2212;1</sup> in the detection range from 1.39 to 1.43. The corresponding wavelength resolution is obtained about 7.58&#x00A0;&#x00D7; 10<sup>&#x2212;6</sup> RIU. Moreover, the ultra-wide range and high sensitivity of the sensor can be flexibly adjusted by a polarization controller to meet different practical requirements. Therefore, the proposed sensor would be a suitable candidate for medical testing, bio-sensing and environmental monitoring.
ISSN:1943-0655

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