Open AccessSurface plasmon resonance sensor using a polarization-maintaining fiber on a hetero-core optical fiber structure with gold thin film
Author(s) -
Ai Hosoki,
Michiko Nishiyama,
Kazuhiro Watanabe,
Nozomu Sakurai
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.469165
Subject(s) - materials science , surface plasmon resonance , refractive index , optics , fiber optic sensor , optical fiber , surface plasmon , polarization (electrochemistry) , photonic crystal fiber , wavelength , localized surface plasmon , core (optical fiber) , optoelectronics , polarization maintaining optical fiber , graded index fiber , plasmon , nanotechnology , chemistry , physics , nanoparticle , composite material
This study experimentally demonstrated the effects of two polarization-maintaining fibers (PMFs) as a sensing region instead of conventional single-mode fiber (SMF) using Au-coated hetero-core optical fiber surface plasmon resonance (SPR) sensor. We experimentally observed that the SPR resonant wavelength is shifted toward longer wavelength with refractive index (RI) increasing from 1.332 to 1.396. A PMF sensor exhibits the broad SPR spectra, resulting in a higher sensitivity with a 1.5-fold change in the light intensity at 850 nm relative to RI, compared with the SMF case. Discussions most likely responsible for this effect are given by the lower angular distribution peak in the hetero-core region of PMFs.