Experimental analysis demonstrates improved sensitivity for refractive index and temperature detection, suggesting effective applications in pharmaceutical settings.
This study presents an L-shaped plastic optical fiber-based surface plasmon resonance (POF-SPR) sensor fabricated using thermal imprinting. One arm of the L-shaped structure is coated with an Ag film, serving as the refractive index (RI) sensing channel, while the other arm is coated with an Ag/PDMS film, functioning as the temperature sensing channel, enabling dual-parameter detection of both RI and temperature. Experimental results demonstrate RI and temperature sensitivities of 1790.957 nm/RIU and -0.935 nm/°C within the RI range of 1.333–1.363 and the temperature range of 0–70 °C, respectively. These results significantly outperform most comparable studies. The sensor offers advantages including low cost, simple fabrication, high detection sensitivity, low crosstalk, and a wide temperature detection range, making it suitable for broad applications in biological and pharmaceutical domains.
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Yang et al. (2025) studied this question.
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