title: [Spectra modulated surface plasmon resonance sensor based on side polished multi-mode optical fiber].
abstract: 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 1.333 to 1. 431 RIU, with the average spectral sensitivity of 4.11 x 10(3) nm RIU(-1), which is better than the reported results. Especially, in the refractive index range of 1. 417 1. 431 RIU, the sensitivity reaches to 1.09 x 10(4) nm RIU(-1). The minimum resolution of approximately 3.6 x 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.
authors.forename: Yun-Han
authors.initials: YH
authors.lastname: Luo
authors.forename: Xiao-Long
authors.initials: XL
authors.lastname: Chen
authors.forename: Meng-Yun
authors.initials: MY
authors.lastname: Xu
authors.forename: Jia
authors.initials: J
authors.lastname: Ge
authors.forename: Yi-Long
authors.initials: YL
authors.lastname: Zhang
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: He
authors.forename: Jie-Yuan
authors.initials: JY
authors.lastname: Tang
authors.forename: Jian-Hui
authors.initials: JH
authors.lastname: Yu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Chen
authors.forename: Xing-Dan
authors.initials: XD
authors.lastname: Chen
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology; D006046:Gold; D055100:Optical Fibers; D012031:Refractometry; D015203:Reproducibility of Results; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold