Quick response hydrogen LSPR sensor based on a hetero-core fiber structure with palladium nanoparticles

A novel fiber optic localized surface plasmon resonance (LSPR) hydrogen sensor has been developed based on the hetero-core structured with palladium nanoparticles (PdNPs) onto a cylindrical cladding surface. In a light-intensity-based experiment with an LED operating at 850 nm, it has been observed that a transmitted loss change of 0.23 dB was induced with response and recovery times of 1.5 and 3.2 s for 4% hydrogen which are the fastest response times among optical fiber hydrogen sensors. The proposed sensor resolved the inevitable trade-off issue between sensitivity and response time which existed in the previously reported SPR sensors, with keeping the response time below 2.0 s even in a high sensitivity region of interest. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Automated summary

A novel fiber optic hydrogen sensor based on localized surface plasmon resonance (LSPR) with palladium nanoparticles has been developed, showing the fastest response times among optical fiber hydrogen sensors. The sensor successfully resolves the trade-off between sensitivity and response time, maintaining a response time below 2.0 seconds even in high sensitivity regions.