Open AccessSimultaneous measurement of refractive index and temperature for prism-based surface plasmon resonance sensors
Author(s) -
Wei Luo,
Rujing Wang,
Hairong Li,
Jieting Kou,
Xinhua Zeng,
He Huang,
Xiaobo Hu,
Wei Huang
Publication year - 2019
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.27.000576
Subject(s) - prism , optics , refractive index , materials science , surface plasmon resonance , wavelength , surface plasmon , triangular prism , resonance (particle physics) , ray , plasmon , physics , particle physics , nanoparticle , nanotechnology
A detailed theoretical model is provided to analyze the effects of temperature on prism-based surface plasmon resonance (SPR) sensors, including temperature dependence of the metal and prism. A complete sensitivity matrix simultaneously measures variations in refractive index (RI) and temperatures using measurements at two wavelengths for the angular-interrogation mode, or at two angles of incidence for the wavelength-interrogation mode. Correction of matrix coefficients improves accuracy of the two modes. Validation is performed using a self-designed wavelength SPR system with an adjustable incident angle perform. This method provides a new way to detect the RI and may lead to the better design and fabrication of prism-based SPR sensors.