Dual-parameter fiber optic surface plasmon resonance sensor with narrow FWHM based on an incidence angle adjusting method
Year: 2024
Type: article
Abstract: We propose a dual-parameter surface plasmon resonance (SPR) sensor based on a simple, and effective incidence angle adjustment method. It is capable of simultaneously detecting the refractive index and temperature of a liquid. For conventional SPR fiber sensors, the resonance dip will be abnormally broadened in the near-infrared band, leading to difficulty in identifying the SPR dip by the spectrometer. The FWHM of the resonance dip depends on the SPR intensity. Therefore, we propose to utilize the bubble structure to change the incidence angle, which can enhance SPR intensity and thus reduce the FWHM of the resonance dip. During our experiments, we investigated the modulation effect of bubble size on the SPR effect. Subsequently, a two-parameter sensor with a narrow FWHM was prepared using PDMS, and the experimental results show that no crosstalk exists between the two sensing channels. This sensor is beneficial for improving the FWHM of SPR dip.
Source: Optics Express
DOI: 10.1364/oe.538596
Authors: Lulu Sun, Ziyi Yang, Wanyu Ma, Hongman Wang, Bo Zhang, Silin Yan, Ji Ma
Institution: Liaoning Shihua University
Language: English
Topic: Advanced Fiber Optic Sensors
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Awards: G3104142720, G868477167
OpenAlex ID: W4402749970