A novel high-sensitivity sensor with asymmetric elliptical shaped exposed core and gold coating for sucrose and chemical concentration detection

• Published in: Sensing and Bio-Sensing Research 2024-08, Vol.45, p.100679, Article 100679
• Main Authors: Hossain, Tanvir, Rahman, Md. Arafat, Rahman, Md. Rifat, Ahmed, Tanvir
• Format: Article
• Language: English
• Subjects: Perfectly matched layer; Photonic crystal fiber; Surface plasmon polarization and surface plasmon wave; Surface plasmon resonance
• ISSN: 2214-1804; 2214-1804
• DOI: 10.1016/j.sbsr.2024.100679

The article introducing an innovative exposed core SPR biosensor employing an asymmetrical elliptic air hole PCF known for remarkable sensitivity. Gold-plated fiber sensor detects changes in refractive index. This sensor effectively covers a RI scale of 1.28 to 1.42 for analytes, showcasing its versatility in simultaneous detection. Taking into account the RI change at the outer surface, attractive sensing implementations such as optimal wavelength sensitivity of 97,000 nm/RIU and optimal amplitude sensitivity of 529.20 RIU−1 are attained. Furthermore, with a resolution of 9.09 × 10−6 RIU, a figure in merit of 170 RIU−1, an FWHM of 570 nm, and a detection accuracy of 0.0166 nm−1, the suggested sensor is impressive. This suggested sensor finds application in monitoring sucrose solutions across a spectrum ranging from 0% to 45% chemical concentration over time. It has an ideal amplitude sensitivity of 530.95 RIU−1 and an ideal wavelength sensitivity of 10,000 nm/RIU for sucrose solutions at the 40% concentration level. Furthermore, the sensor shows an ideal wavelength sensitivity of 35,000 nm/RIU and an ideal amplitude sensitivity of 793.80 RIU−1 for the detection of 2-propanol. Nevertheless, beyond sucrose noticing auspicious sensing qualities by the suggested sensor its feasibility for impact fully identifying a range of biochemical and organic samples. As a result, the proposed sensor holds promise as an exemplary choice the realms in biomedical sensing, the detection of lower RI analyses as well as chemical analysis. Streamlining practical application, the sensor's structure incorporates eight elliptical air holes, uncomplicated readily manufactural with existing technologies. •A novel exposed-core PCF sensor with eight elliptical air holes is proposed in RI sensing.•Shows a high linear coefficient of 0.9881.•Optimum WS of 35,000 nm/RIU as well as AS of 793.80 RIU-1 are obtained for 2-propanol detection.