Impact Statement:A very little effort has been devoted to the design of the PCF-SPR sensor that can sense RI less than 1.33. The proposed sensor is capable of detecting low RI of analyte ...Show More
Abstract:
A highly sensitive surface plasmon resonance (SPR) sensor on a dual-core photonic crystal fiber (PCF) for low refractive index (RI) detection is presented in this paper. ...Show MoreMetadata
Impact Statement:
A very little effort has been devoted to the design of the PCF-SPR sensor that can sense RI less than 1.33. The proposed sensor is capable of detecting low RI of analyte (1.29-1.39) with maximum wavelength sensitivity and resolution of 116,000 nm/RIU and 8.62×10-7, respectively which are the highest among reported PCF-SPR sensor to date. Therefore, the proposed sensor would be an excellent choice for applications like pharmaceutical inspection and other low refractive index analyte detection.
Abstract:
A highly sensitive surface plasmon resonance (SPR) sensor on a dual-core photonic crystal fiber (PCF) for low refractive index (RI) detection is presented in this paper. Plasmonic material silver (Ag) is deposited outside of the fiber structure to detect changes of the surrounding medium's refractive index. To prevent oxidation a thin layer of titanium dioxide (TiO2) is employed on top of the silver. The sensor shows maximum wavelength sensitivity and amplitude sensitivity of 116,000 nm/RIU and 2452 RIU-1 with corresponding resolutions (R) of 8.62 × 10-7 and 5.55 × 10-6 RIU, respectively. A thorough study of the relevant literature yielded that these attained sensitivities in both interrogation methods are the highest among reported PCF-SPR sensors to date. In addition, the sensor possesses a very high figure of merit of 2320 in the sensing range of 1.29 to 1.39. Therefore, it would be a suitable candidate for pharmaceutical inspection, organic chemical sensing, and biosensing and other analytes detection.
Published in: IEEE Photonics Journal ( Volume: 11, Issue: 5, October 2019)
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