Share with Facebook
Tweet This
Post on reddit
Share with LinkedIn
Add to CiteULike
Add to Mendeley
Add to BibSonomy
Abstract
A surface plasmon resonance sensor composed of photonic crystal fibers (PCF-SPR) with an ${\rm Au} \text{-} {{\rm TiO}_2} \text{-} {\rm Au}$ triple layer is designed for refractive index (RI) sensing and analyzed theoretically by the finite element method. The sensor exhibits enhanced resonance coupling between the core mode and surface plasmon polariton (SPP) mode as well as better sensitivity than the structure with a single gold coating. Furthermore, the ${\rm Au} \text{-} {{\rm TiO}_2} \text{-} {\rm Au}$ tri-layer structure narrows the linewidth of the loss spectrum and improves the figure of merit (FOM). In the analyte RI range of 1.30–1.42, the maximum wavelength sensitivity is 20,300 nm/RIU, resolution is ${4.93} \times {{10}^{- 6}}$, amplitude sensitivity is ${6427}\;{{\rm RIU}^{- 1}}$, and FOM is ${559}\;{{\rm RIU}^{- 1}}$. The results provide insights into the design of high-performance PCF-SPR sensors.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Xiaokai Liu, Jinhui Yuan, Yuwei Qu, Jingao Zhang, Xian Zhou, Binbin Yan, Kuiru Wang, Xinzhu Sang, and Chongxiu Yu
Appl. Opt. 62(16) E83-E91 (2023)
Hairui Fang, Chenjing Wei, Dong Wang, Long Yuan, Shengxi Jiao, Zhiyu Bao, and Hanrui Yang
J. Opt. Soc. Am. B 37(3) 736-744 (2020)
Jingao Zhang, Jinhui Yuan, Yuwei Qu, Shi Qiu, Chao Mei, Xian Zhou, Binbin Yan, Qiang Wu, Kuiru Wang, Xinzhu Sang, and Chongxiu Yu
J. Opt. Soc. Am. B 40(4) 695-704 (2023)