Numerical investigation into a surface plasmon resonance sensor based on optical fiber microring

Autor: Chunliu Zhao, Yanru Wang, Dongning Wang, Zhewen Ding
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Photonic Sensors, Vol 7, Iss 2, Pp 105-112 (2017)
Druh dokumentu: article
ISSN: 1674-9251
2190-7439
DOI: 10.1007/s13320-017-0359-7
Popis: Abstract A reflective surface plasmon resonance (SPR) sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fundamental mode of a thin-core fiber (TCF). The refractive index (RI) sensing can be achieved as the surface plasmons are sensitive to changes in the refrective index of the analyte. Numerical simulation results show that the resonance spectrum shifts toward the shorter wavelength gradually when the analyte refractive index increases from 1.0 to 1.33, whereas it shifts toward the longer wavelength gradually when the analyte refractive index increases from 1.33 to 1.43, and there is a turning point at the refractive index value of 1.33. The highest sensitivity achieved is up to 2.30×103 nm/RIU near the refractive index value of 1.0. Such a compact sensor has potential in gaseous substance monitoring.
Databáze: Directory of Open Access Journals
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