A master thesis from Aalborg University
Gold-wire Gratings: for Sensor Applications
[ld-wire Gratings - for Sensor Applications]
Author(s)
Term
4. term
Education
Publication year
2011
Submitted on
2011-10-16
Pages
90 pages
Abstract
Due to the plasmon resonance conditions of metallic gratings, these can be used for sensor applications. The theoretical aspects of basic plasmonics are investigated and their resonance conditions are reviewed. Through use of Green's function, a theoretical model for the near-field of a gold grating is set up and different parameters are varied in order to investigate the effects on the electrical field around the grating wires. The experimental work is carried out with focus on producing gold and silicon gratings through e-beam lithography. The structures of the resulting gratings are characterised by use of scanning electron microscopy and atomic force microscopy. The optical properties of the gratings are investigated in terms of second harmonic spectroscopy. The obtained spectra are finally sought explained and related to the theoretical observations.
Documents
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