期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 49, 期 35, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/35/355102
关键词
fiber optic sensor; surface plasmon resonance; nano-porous silica coating
资金
- National Science Foundation of China [of 61308046, 61275125]
- Doctoral Fund of Ministry of Education of China [20114408120002, 20124408110003]
- Basic Research Program funds of Shenzhen
A liquid-core fiber optic surface plasmon resonance sensor with an adjustable nano-porous silica coating is first presented in this paper. By adjusting the refractive index of the nano-porous silica coating, the sensor can be used in different refractive index detection ranges. A low refractive index interval of 1.33-1.34 and a high refractive index interval of 1.42-1.44 are taken as examples to be investigated. Results show that our sensor works well in these two intervals by using appropriate nano-porous silica coatings. The highest sensitivities of the low and high refractive index intervals are obtained to be 5840 nm/RIU and 5120 nm/RIU, respectively. In addition, the sensing performances and the working wavelengths can be adjusted to meet different working requirements by changing the refractive index of the nano-porous silica coating. We also take the single mode incidence cases to explain the effects of different single incident light modes on the sensing performances.
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