Study of LSPR Spectral Analysis Techniques on SPR Optical Fiber Sensors

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Dos Santos, PSS (Author) Other; de Almeida, JMMM (Author) FCUP; Coelho, LCC (Author) FCUP

Journal

Title: U.Porto Journal of Engineering

Vol. 8 No. 2

Pages: 12-17

Publisher: Universidade do Porto. Faculdade de Engenharia

Indexing

Scopus - 12 Citations

Other information

Authenticus ID: P-00W-NWW

DOI: 10.24840/2183-6493_008.003_0004

Abstract (EN): Nanoparticles create localized surface plasmonic resonances (LSPR) with lower surrounding refractive index (SRI) sensitivities than their propagating SPR counterpart, originated in thin films. Historically, LSPR SRI sensitivities enhancements were achieved through spectral analysis methods that focus on unique spectral features. Herein, a study using that methodology was applied on SPR devices resulting in an increased sensitivity to SRI. It was found that by applying the inflection point method on optical fiber SPR sensors resulted in both sensitivity and resolution increments up to 44 and 35 %, respectively, in the SRI range from 1.3333 to 1.4150. Thus, successfully improving sensing capabilities of SPR based optical fiber sensors. © 2022, Universidade do Porto - Faculdade de Engenharia. All rights reserved.

Language: English

Type (Professor's evaluation): Scientific