Electronic Theses and Dissertations

Identifier

6612

Date

2020

Document Type

Thesis

Degree Name

Master of Science

Major

Physics

Concentration

Materials Science

Committee Member

Thang Hoang

Committee Member

Xiao Shen

Committee Member

Chenhui Peng

Abstract

Star-shaped gold nano-particles with sharp spikes, Au nanorods, and silver nanocubes are considered as plasmonic particles. We investigate the plasmon resonances of an individual gold nanostar coupled to a gold film, separated by a dielectric layer. Through dark field scattering measurements of many individual nanostars, a statistical observation of the scattered spectra is obtained and compared with extensive simulation data to reveal the origins of the resonant peaks. We observe that an individual nanostar on a flat gold film can result in a resonant spectrum with single, double or multiple peaks. Further, these resonant peaks are strongly polarized under white light illumination. Results of plasmonic resonances of single nanorods and nanocubes on a gold film and a glass slide are also presented. Our results demonstrate a simple method to create an ultrasmall mode volume plasmonic platform which could be useful for applications in sensing or enhanced light-matter interactions.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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