Surface plasmon resonance based on multi-angel tilted fiber Bragg grating for highly sensitive and wide range refractive index measurement
| Autor: | Tuan Guo, Shunshuo Cai, Zhaochuang Zhang, Xuejun Zhang, Bai-Ou Guan, Xiaoyong Chen, Jian Xu |
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| Rok vydání: | 2016 |
| Předmět: |
Permittivity
Materials science business.industry 020208 electrical & electronic engineering Resonance 02 engineering and technology Grating engineering.material 01 natural sciences 010309 optics Optics Fiber Bragg grating Coating 0103 physical sciences 0202 electrical engineering electronic engineering information engineering engineering Reflection (physics) Surface plasmon resonance business Refractive index |
| Zdroj: | 2016 15th International Conference on Optical Communications and Networks (ICOCN). |
| Popis: | Surface-plasmon resonance (SPR), which results from the strong sensitivity of the plasmon-propagation constant to the permittivity of a nanoscale layer of material on a metal surface, is an exquisitely sensitive technique to detect chemical and biochemical changes occurring between molecules. In this work, we propose and demonstrate an SPR sensor based on a multi-angle tilted fiber Bragg grating (TFBG) coated by a 50 nm-thickness gold film for refractive index (RI) measurement. Experimental results show that wide range of RI, from 1.15 to 1.43, can be detected using the proposed SPR sensor, with sensitivity of 523.41 nm/RIU (refractive index unit). In addition, with designed as a probe, through coating a gold film as a reflection mirror in the cleaved end downstream of the grating, the length of the entire sensor is only 2 cm, making it easy to insert into the media for biochemical measurements. |
| Databáze: | OpenAIRE |
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