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Fabrication of plasmonic nanoparticle structures on planar substrates

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Title: Fabrication of plasmonic nanoparticle structures on planar substrates
Author: Lwin, Nyein Z.
Advisor: Halas, Naomi J.
Degree: Master of Science thesis
Abstract: Studying the optical properties of coupled plasmonic systems is important for both fundamental understanding and optimization of plasmon-enhanced optical sensing applications such as surface enhanced Raman scattering (SERS), near-field optical microscopy (NSOM) and surface plasmon resonance (SPR) sensing. Two nanoparticle structures of particular interest include nanoshell dimers and nanoparticles suspended over a metal film. We present a bench-top wet-chemistry method for nanoparticle dimer fabrication. The significant optical near-field enhancement in the gap between nanoparticles in a dimer structure could make it a powerful tool for enhanced spectroscopy applications. A simple geometry of nanoparticles suspended over a metal film is fabricated and its optical response is probed at various film thicknesses using optical transmission spectroscopy. A virtual resonance state emerged from interaction between discrete nanoparticle plasmons and the effective continuum of film plasmons shows a strong red-shift as the film thickness is decreased.
Citation: Lwin, Nyein Z.. (2006) "Fabrication of plasmonic nanoparticle structures on planar substrates." Masters Thesis, Rice University. http://hdl.handle.net/1911/17894.
URI: http://hdl.handle.net/1911/17894
Date: 2006

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