Notice of retraction
Vol. 32, No. 8(2), S&M2292

ISSN (print) 0914-4935
ISSN (online) 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
is covered by Science Citation Index Expanded (Clarivate Analytics), Scopus (Elsevier), and other databases.

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Published in advance: October 7, 2020

Dual Window Phenomenon for Surface Plasmon Resonance Sensor Based on Plastic Optical Fiber [PDF]

Yu-Cheng Lin

(Received November 16, 2019; Accepted June 23, 2020)

Keywords: surface plasmon resonance, plastic optical fiber, sensor, thin film

Surface plasmon resonance (SPR) sensors are attracting considerable attention for their use in biomaterials inspection, chemical detection, and physical testing. This paper presents an experimental investigation on an SPR-based plastic optical fiber (POF) refractive index sensor. The sensor was fabricated using a POF in which some of the core was removed by polishing and a 40 nm gold thin film was deposited on the polished surface. The refractive index sensor was used to measure analytes with refractive indices in the range from 1.330 to 1.456. Two windows, an SPR window and a refraction window, were observed in the optical transmission spectrum, where the SPR window from 650 to 700 nm and the refraction window from 760 to 780 nm show a strong linear relationship between the SPR wavelength and the normalized transmitted intensity. Sensitivities of 328 nm/RIU and −0.83/RIU (RIU, refractive index unit) were achieved for the SPR and refraction windows, respectively. We also discuss the merits of both windows for biomolecule sensing.

Corresponding author: Yu-Cheng Lin

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