I have investigated gap plasmon mode of an eccentric coaxial waveguide structure
using effective index method. The results found good agreement with fully-vectorial
numerical calculation. In the eccentric structure, a strong field localization has been noticed at and around the smallest gap. Analysis showed the increase of effective
index of lowest-order waveguide mode to 3.7 in the structure considered with a 2 nm
minimum gap for a wavelength of 4 micrometer. In the visible regime, the effective index increases to over 10 for the same structure.
Nanohole arrays, both flowover and flow-through formats, have been fabricated
using focused ion beam (FIB). A 2-color LED-based nanohole sensor has been presented. The objective of the sensing platform was to register mutually opposite intensity change of transmitted light when the dielectric medium of metal-dielectric interface of the nanohole sensor undergoes a change. A number of tests with microfluidics setup demonstrated the proof-of-concept.
| Identifer | oai:union.ndltd.org:uvic.ca/oai:dspace.library.uvic.ca:1828/3073 |
| Date | 04 October 2010 |
| Creators | Choudhury, Asif Imran Khan |
| Contributors | Gordon, Reuven |
| Source Sets | University of Victoria |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | Available to the World Wide Web |
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