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Permanent link (DOI): https://doi.org/10.7939/R3ST7F282

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Nanostructured Metamaterials for Thermal Applications Open Access

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Other title
Subject/Keyword
thermal conductivity
thermal photovoltaic
nanowire
metamaterial
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Hu, Huan
Supervisor and department
Jacob, Zubin (Electrical and Computer Engineering)
Pramanik, Sandipan (Electrical and Computer Engineering)
Examining committee member and department
Nazemifard, Neda (Chemical and Materials Engineering)
Jacob, Zubin (Electrical and Computer Engineering)
Pramanik, Sandipan (Electrical and Computer Engineering)
Wang, Xihua (Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization
Photonics and Plasmas
Date accepted
2014-09-26T11:31:03Z
Graduation date
2014-11
Degree
Master of Science
Degree level
Master's
Abstract
Metamaterials are artificially engineered materials with tailored properties for applications in imaging, sensing, waveguiding and quantum optics. Even though they hold the potential for transformative impact, industrial applications have been impeded by large absorption losses in material properties. This thesis puts forth thermal applications of metamaterials where optical losses are a necessary design component and can be fruitfully utilized for applications. A wide range of metamaterial designs have been numerically studied and optimized for applications as narrowband perfect absorbers/emitters in the near-infrared wavelength region compatible with low bandgap thermophotovoltaic cells. We study the collective polaritons of nanowire and thin film metamaterials to show that their selective absorption and thermal emission properties could be used for thermophotovoltaic applications. The design and simulation results are in excellent agreement with initial the results of experiments on metallic nanowire arrays in a dielectric host matrix. We also evaluate the contribution of phonon-polaritons to thermal conductivity of silicon carbide nanowire arrays. The comprehensive analysis of collective metamaterial modes and analytical tools developed in the thesis can aid future design and optimization of thermal metamaterials.
Language
English
DOI
doi:10.7939/R3ST7F282
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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