Laser-activated optofluidic microrod hydrogen sensor with single ppm sensitivity and 5 orders of magnitude detection range
Functionalized whispering-gallery-mode (WGM) optofluidic microcavities offer a promising platform for gas detection. However, achieving high-performance hydrogen detection with a large dynamic range remains challenging. Traditional microcavity materials are often insensitive to hydrogen adsorption, and there is a trade-off concerning the intracavity Q factor: a high Q factor enables high resolution but limits the measurable range. In this study, we propose an H-Pt/WO<sub>3</sub> inner-deposited optofluidic microrod sensor and employ laser-triggered technology for on-line H<sub>2</sub> detection. By leveraging the thermal conduction effect, our design overcomes the trade-off between high precision and a large range, demonstrating ppm sensitivity and a detection range spanning 5 orders of magnitude.
Authors
- Baicheng Yao (ORCID: https://orcid.org/0000-0001-8368-5815)
- Yanhong Guo
- Shuya Yuan
- Yuchen Wang (ORCID: https://orcid.org/0000-0002-6710-6710)
- Yicheng Li (ORCID: https://orcid.org/0000-0003-4447-7452)
- Yun-Jiang Rao
- T. Y. Tan (ORCID: https://orcid.org/0000-0002-2322-8353)
- Guangming gmzhao semi.ac.cn
Institutions
- University of Electronic Science and Technology of China (CN)
Publication Details
- Published
- 2025-05-22
- DOI
- https://doi.org/10.1117/12.3061705
- Primary Topic
- Mechanical and Optical Resonators
- Type
- article
- Field-Weighted Citation Impact
- 0.00