Date of Award

2013

Degree Type

Thesis

Degree Name

M.Sc.

Department

Physics

First Advisor

Rangan, Chitra

Keywords

Pure sciences, Biological sciences, Applied sciences, Biosensors, Green function, Plasmonic, Turbid media

Rights

CC BY-NC-ND 4.0

Abstract

The characterization of turbid media, such as colloidal suspensions such as milk, is a challenging task due to the attenuation of incident fields within the medium. In this work, the potential performance of a novel sensing technology is assessed for the characterization of such media. The device is a hybrid plasmonicwaveguide biosensor and consists of an array of gold nanoparticles deposited atop a waveguide multilayer structure. The performance of the device is modelled using a Green function approach and is benchmarked to a surface plasmon resonance (SPR) sensor. The results of the analysis show the hybrid sensor to be several orders of magnitude more sensitive to changes in the turbid medium than the SPR sensor.

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