Work

Experimental determination of the sensitivity of Bloch Surface Waves based sensors

Year: 2010

Type: article

Abstract: Detection of glucose in water solution for several different concentrations has been performed with the purpose to determine the sensitivity of Near Infrared Bloch Surface Waves (lambda = 1.55microm) upon refractive index variations of the outer medium. TE-polarized electromagnetic surface waves are excited by a prism on a silicon nitride multilayer, according to the Kretschmann configuration. The real-time reflectance changes induced by discrete variations in glucose concentration has been revealed and analyzed. Without using any particular averaging strategy during the measurements, we pushed the device detection limit down to a glucose concentration of 2.5mg/dL, corresponding to a minimum detectable refractive index variation of the water solution as low as 3.8.10(-6).

Source: Optics Express

DOI: 10.1364/oe.18.008087

Authors: Fabrizio Giorgis, Emiliano Descrovi, Caterina Summonte, Lorenzo Dominici, Francesco Michelotti

Institutions: Politecnico di Torino, National Interuniversity Consortium for the Physical Sciences of Matter, Sapienza University of Rome

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

OpenAlex ID: W2086667101

FWCI: 4.372

Cites: 22

Cited by: 114

Related to: 10