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Fall 2014

Guo, Yu

Metamaterials are artificial media designed to achieve exotic electromagnetic responses that are not available in conventional materials. Engineering the black body thermal emission using metamaterials promises to impact a variety of applications involving thermophotovoltaics, energy management and

coherent thermal sources. Metamaterials with hyperbolic dispersion exhibit a broadband singularity in the bulk photonic density of states, which can be thermally excited and utilized in various thermal applications. In this report, we give a detailed account of equilibrium and non-equilibrium

reflection or material absorption leads to a finite quality factor of all resonances. Here we report on our result that evanescent waves can lead to both a phase and amplitude balance causing an ideal and Fabry-Perot resonance condition in spite of material absorption and non-ideal boundary discontinuities

Spring 2022

Liu,Andi

For large-scale metallic structures, such as aircraft, ships, and pipelines, their failure could be catastrophic. A structural health monitoring system (SHM) to detect failures in advance is essential. The Internet-of-Things (IoT) is a key technology applied for remote structural health monitoring

research is to design and develop an IoT-based structural health monitoring system that includes an ultra-low-power miniaturized sensing node integrated with a three-dimensional (3D) stress and strain sensor. The system can monitor 3D stress and strain values and upload them to the cloud. The developed IoT

-in BLE wireless communication function, a high precision 16-bit analog-to-digital converter (ADC) and a 32Mbytes flash memory. It interfaced with a compact 3D MEMS strain-gauge typed sensor (7mm x 7mm) developed by a team in mechanical engineering at the University of Alberta. The sensor has high

Spring 2013

Leontyev, Viktor A

. Simulations have shown a competitive effect from two structural anisotropy sources, causing a band gap suppression for one of two linear polarizations, and high polarizing ability. Simulations were compared to the measurements with a very good agreement in spectral response. Subwavelength column arrays were

porous metal. Anisotropic magnetic response was observed in silver columns away from the plasma resonance. Combined with a large permittivity in the infrared, this has potential for future refractive index engineering.

Fall 2014

Beaudry, Allan L

In this thesis, a new technique named vapour-liquid-solid glancing angle deposition (VLS-GLAD) will be used to enhance structural control over branched nanowire (NW) arrays. NWs are 1D crystals that have been extensively applied in sensors, photovoltaic devices, and transistors. The functional

also be used to enable the fabrication of azimuthally aligned nanotrees without requiring epitaxy at the substrate. Aperiodic signals will be encoded into diameter oscillations along the length of branches by engineering their local shadowing environment using dynamic substrate motion during growth

Fall 2024

Firouzeh, Seyedamin

structure and defect engineering. These properties make them attractive candidates for future spintronic applications with further miniaturization. Recently 2D magnetic materials have been discovered, which exhibit large magnetoresistance (MR) effects, albeit only at cryogenic temperatures, limiting their

effect in 2D chiral graphene films and systematically investigate its properties under different conditions. Overall, we report new results which are relevant for future magnetic and spintronic devices. We also describe possible avenues of further investigations based on the results in this thesis.

Fall 2023

Cui, Yihao

functionalities such as pattern recognition, and inference calculations with improved performance through experience and iterative training cycles. Inspired by the structural organization of a biological brain, ANNs consist of interconnected layers of artificial neurons, or nodes, where input signals are weighted

concepts allow for specified dispersion engineering required for low insertion loss (< 0.3dB) and compact footprint (Lπ = 5 − 20µm) designs. Such non-volatile phase-shifters can be embedded within a cascaded MZI mesh to implement a programmable zero static energy consumption matrix vector multiplication

Fall 2020

Deif, Sameir E. E.

This thesis work presents structural health monitoring (SHM) techniques for coated-metallic structures based on Chipless Radio Frequency Identification (RFID) technology. The structures of interest for this study include pipelines for crude oil transportation and storage tanks (or terminals). The

performance are presented. It provides a reference source for the engineering and manufacturing process in regards to the trade-off between performance and cost for more economical applications of the sensor in the field.

Fall 2017

Mahpeykar, Seyed M

nanostructured devices as compared to a planar structure. Among various technologically feasible nanostructures, a two-dimensional nano-branch array is demonstrated as the most promising structure and proven to be able to maintain its performance despite structural imperfections common in fabrication

fabrication for light management in optoelectronic devices. Furthermore, I will leverage a modeling approach for optoelectronic engineering of colloidal quantum-dot (CQD) thin-film solar cells. The presence of a strong efficiency loss mechanism, called the “efficiency black hole”, that can hold back the

Fall 2016

Adl, Ahmad H

, diethanolamine, triethanolamine, etc. Furthermore, these prior reports did not examine the effect of the stabilizers on the performance of the resulting ZnO thin films in optoelectronic devices. Our study also examines longer chain and acidic stabilizers such as oleic acid, oleylamine and octadecene, which are

the grain size, crystallographic texture, and resistivity of solution processed ZnO films on thermal oxide-coated silicon substrates, and found large variations in the structural and electrical properties as a consequence of the choice of sol stabilizer. We synthesized ZnO films using various sol