Functional Properties of Hybrid Resonances in Plasmonic Nanocrystals

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

Click here to download the PDF file.

Supplemental Files: 

Creator: 

Prezgot, Daniel Martin

Date: 

2020

Abstract: 

Metal nanocrystals support unique light-matter interactions through a phenomenon known as the localized surface plasmon resonance (LSPR). These resonances show a great deal of sensitivity to their local environment, and by altering this environment it is possible to produce new, "hybridized" plasmon modes. The far-field spectral qualities, and the near-field electromagnetic properties can by heavily manipulated through the generation of hybridized plasmon modes. This work explores the properties and functions of hybridized plasmon modes in a variety of systems. Finite-difference time-domain modelling use used to correlate the experimental spectral response is with the calculated near-field spatial distribution of hybridized modes in a number of systems involving silver nanocubes (AgNC). These systems demonstrate it is possible to carefully monitor the environment of a nanocrystal, induce an unusually sharp spectral extinction in dielectric-coated AgNCs, and manipulate the spatial distribution of plasmon modes in colloidal composite Ag@Cu2O core-shell nanocrystals. These properties are applied to functional materials, including photothermal and colour patterning of a plasmonic system driven by the embedment of an AgNC into a polymer matrix. The spectral signature of hybridized plasmon modes is used to both characterize and manipulate the degree of photothermal heating in this thermoplasmonic patterning system. Hybridized gap-plasmons are used to generate wide range of colours, with controllable palettes using AgNC-over-Au and AgNC-over-Ag nanoparticle-over-mirror (NPoM) films. Lastly the potential for alternative plasmonic materials for ultraviolet (UV) plasmonics was explored. The potential for In and Al nanocrystals for UV surface-enhanced Raman spectroscopy was investigated. All these systems demonstrate the potential and advantage of using hybridized plasmon modes to manipulate the far-field and near-field optical response of functional plasmonic materials.

Subject: 

Physical Chemistry

Language: 

English

Publisher: 

Carleton University

Contributor: 

Co-author: 
Adam Bottomley
Co-author: 
Jason Coyle
co-author: 
Alexandra Gale-Mouldey
co-author: 
Emma Jorgenson
co-author: 
Stephen Tatarchuk

Thesis Degree Name: 

Doctor of Philosophy: 
Ph.D.

Thesis Degree Level: 

Doctoral

Thesis Degree Discipline: 

Chemistry

Parent Collection: 

Theses and Dissertations

Items in CURVE are protected by copyright, with all rights reserved, unless otherwise indicated. They are made available with permission from the author(s).