Ultra-sensitive hexagonal PCF-SPR sensor with a broad detection range

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wei Liu
  • Chunjie Hu
  • Lei Zhou
  • Zao Yi
  • Chao Liu
  • Jingwei Lv
  • Lin Yang

Detail(s)

Original languageEnglish
Pages (from-to)1545-1554
Journal / PublicationJournal of Modern Optics
Volume67
Issue number20
Publication statusPublished - Nov 2020

Abstract

A photonic crystal fibre (PCF) sensor based on surface plasmon resonance (SPR) with a hexagonal structure and external gold coating is designed and demonstrated to have a broad detection range and ultra-high sensitivity. Gold is chosen as the plasmonic materials due to the inert and stable chemical properties and the gold coating on the PCF-SPR sensor also simplifies the detection and fabrication processes. The sensing properties are analysed by the finite element method (FEM). In this sensor, the y-polarized mode with the large mode field area shows better performance such as the high spectral sensitivity of 28,700 nm/RIU, wide analyte refractive index (RI) range from 1.28 to 1.43, resolution of 3.48×10-6 RIU, and maximum amplitude sensitivity of 2481.06 RIU−1. Furthermore, the paragon figure of merit and signal-to-noise ratio of the sensor are 517.81 RIU−1 and 5.18, respectively.

Research Area(s)

  • broad detection-scope, external gold coating, finite element method, Photonic crystal fibre, surface plasmon resonance, ultra-high sensitivity

Citation Format(s)

Ultra-sensitive hexagonal PCF-SPR sensor with a broad detection range. / Liu, Wei; Hu, Chunjie; Zhou, Lei; Yi, Zao; Liu, Chao; Lv, Jingwei; Yang, Lin; Chu, Paul K.

In: Journal of Modern Optics, Vol. 67, No. 20, 11.2020, p. 1545-1554.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review