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Improving the performance of surface plasmon resonance sensors for liquid chemical detection

AURELIAN POPESCU1, DAN SAVASTRU1, ALEXANDRU STANCIU1,*

Affiliation

  1. National Institute R&D of Optoelectronics INOE 2000, 409 Atomistilor Str., Magurele, Ilfov, Romania

Abstract

Our research aims to study four layers surface resonance (SPR) structure containing amorphous As2S3 high refractivity index thin films. Calculations performed show that the SPR curves expressed different shift and sharpness, depending on the thin film thickness. The SPR resonance shift with optimized sensor’s sensitivity is three times larger than the conventional three-layer configuration. However, the curve width is a bit higher also, so that the quality factor of four layers structure, parameter which finally determines the sensor’s resolving power, is 2.2 times higher. Fuels and hydrocarbons can be identified successfully with SPR four-layers optical sensors..

Keywords

As2S3 amorphous thin films, Optical chemical sensors, Surface plasmon resonance.

Submitted at: July 12, 2024
Accepted at: July 30, 2024

Citation

AURELIAN POPESCU, DAN SAVASTRU, ALEXANDRU STANCIU, Improving the performance of surface plasmon resonance sensors for liquid chemical detection, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 7-8, pp. 264-268 (2024)