Quasi-D-shaped optical fiber plasmonic refractive index sensor. (20th February 2018)

• Record Type: Journal Article
• Authors: An, Guowen; Li, Shuguang; Wang, Haiyang; Zhang, Xuenan; Yan, Xin
• Is Part Of: Journal of optics. Volume 20:Number 3(2018:Mar.)
• Publication Date: 2018-02-20
• Subjects: photonic crystal fibers -- surface plasmons -- sensor; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/aaaa42
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: A quasi-D-shaped photonic crystal fiber plasmonic sensor with a rectangular lattice is proposed by using Au as a plasmonic layer and graphene to enhance the sensing performance. By moving the core to the edge of the fiber, a shorter polishing depth is achieved, which makes the fiber proposed have a greater mechanical strength than other common D-shaped fibers. Benefiting from the natural advantage of the rectangular lattice, the dual sensing channels make the proposed sensor show a maximum wavelength interrogation sensitivity of 3877 nm/RIU with the dynamic refractive index range from 1.33 to 1.42 and a maximum amplitude sensitivity of 1236 RIU −1 with the analyte RI = 1.41 in the visible region. The corresponding resolutions are 2.58 × 10 −5 and 8.1 × 10 −6 with the methods of the wavelength interrogation method and amplitude- or phase-based method. These advantages make the proposed sensor a competitive candidate for biosensing in the field of refractive index detection, such as water quality analysis, clinical medicine detection, and pharmaceutical testing.