Spectroscopy and Spectral Analysis, Volume. 34, Issue 3, 577(2014)
Spectra Modulated Surface Plasmon Resonance Sensor Based on Side Polished Multi-Mode Optical Fiber
Surface plasmon resonance, which utilizes the resonance of optical evanescent wave with the metal surface plasmon wave, has been developed into a high sensitivity, rapid, label-less measurement method for chemical and biological analysis. In order to improve the spectral sensitivity in refractive index for a side polished fiber surface plasmon resonance sensor, the whole cladding layer and part of core of a multimode fiber was polished off. Additionally, an extra chrome layer with relatively high refractive index was coated on the polished zone before a gold film. The results showed that the sensor can measure the refractive index range from 1333 to 1431 RIU, with the average spectral sensitivity of 411×103 nm·RIU-1, which is better than the reported results. Especially, in the refractive index range of 1417~1431 RIU, the sensitivity reaches to 109×104 nm·RIU-1. The minimum resolution of approximately 36×10-5 RIU was estimated by a combination analysis with the sensor sensitivity and stability. The superiorities possessed by the proposed sensor in high sensitivity, wide detection range, small size and good stability and reproducibility, etc., make it a good candidate for food testing, environmental monitoring, biomedical testing and other related fields.
Get Citation
Copy Citation Text
LUO Yun-han, CHEN Xiao-long, XU Meng-yun, GE Jia, ZHANG Yi-long, HE Yong-hong, TANG Jie-yuan, YU Jian-hui, ZHANG Jun, CHEN Zhe, CHEN Xing-dan. Spectra Modulated Surface Plasmon Resonance Sensor Based on Side Polished Multi-Mode Optical Fiber[J]. Spectroscopy and Spectral Analysis, 2014, 34(3): 577
Received: Sep. 11, 2013
Accepted: --
Published Online: Mar. 14, 2014
The Author Email: Yun-han LUO (yunhanluo@163.com)