Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"meta materials"”.
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Design of meta-materials with novel thermoelastic properties
… including those with multiple constituent materials and void space in nearly any geometry. With an essentially open design space, the onus is now on the engineer to design composite materials which are optimal for their purpose. These new materials, called meta-materials or materials with …
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Engineering Band Structures in Correlated Oxides
… in them. The electronic structure of two parent materials are coherently blended at the interface, and the spin ordering is strongly modified. This method of producing meta materials is a promising new way of material engineering.
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Optical studies of photonic crystals and high index-contrast microphotonic circuits
… Studies of macro-scale 2D photonic crystal meta-materials are first described. Through comparison of experimental and theoretical beam evolution about the super-collimation frequencies, the effects of disorder on beam evolution are pinpointed. Despite the effects of disorder, …
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Data-Driven Characterization of Micro-structural Shape and Topology in Engineering Materials
… shape and topology in engineering materials, integrating invariant geometric descriptors and statistical dimensionality reduction techniques. Specifically, Hu moments, Principal Eigenvalue Moment (PEM), and Principal Component Analysis (PCA) are applied to a diverse dataset …
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Conditional Mechanical Squeezing of a Micromechanical Oscillator Approaching the Quantum Regime
… simple earthworks, inspired by phononic meta-materials of contemporary optomechanics research groups.
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A Study of Quantum Interference and Entanglement with Negative Optics
… precision metrology. The relevant 2D-surfaces or meta-materials (2DMM) require patterns equal to less than a few wavelengths deep hence are far convenient than their 3‐dimensional counterparts.</p>
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Flexigami : folded polygonal unit cells for deployable metamaterials and mechanisms
… with cutting, folding, and fastening of sheet materials. However, contrasting the classical approach of modeling Origami structures as having perfect hinges and rigid panels, consideration of the finite bending and rotational stiffness of these elements is essential to understand their …
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Anomalous phenomena and spectral tailoring in photonic crystals
Photonic crystals are recently discovered meta-materials whose optical properties arise from periodic refractive index variations. In this thesis I examine various aspects of photonic crystals including a self-assembled photonic crystal, anomalous properties arising from periodicity, and tailoring …
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Non-lithographic and scalable manufacturing of silicon micro & nanomaterials
… circuits, fast-discharging batteries, meta-materials, energy conversion systems, and light-weight composites. Novel micro/nanomanufacturing methods - such as 2D and 3D printing, imprinting, self-assembly, deterministic micro-assembly, flexography, and roll-to-roll systems - are among a …
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Graphene-Based Nanodevices in the Superconducting and Strongly Correlated Regimes
… and manipulate high-quality few-atoms-thick materials represents a major advance in condensed matter physics. Assembling these ultra-thin materials into van der Waals heterostructures, i.e., artificial meta-materials with atomically sharp interfaces, markedly increases the rich variety of …
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Design and Additive Manufacturing of Carbon-Fiber Reinforced Polymer Microlattice with High Stiffness and High Damping
… by comparing it with existing families of materials in a stiffness-loss map, which shows that the design is as stiff as commercial CFRP composites and as dissipative as elastomers.
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Development of innovative transducers based on Magnetic Fluids
… and tunable characteristics. The synthesis of materials that are not in nature but that are rea-lized in chemical laboratories is often a response to such a requirement. In particular meta materials and, in general, those materials made by the aggregation of several components to result into a …
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Solidification of eutectics utilizing directional solidification and confining templates for optical metamaterial applications
Fabrication of optical metamaterials, or structured materials with unique optical responses not found in the original material, requires complex and time-consuming methods such as e-beam photolithography, microscale 3D printing, ion beam milling etc. A possible new way to fabricate these unique …
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An Investigation on Acoustic Metamaterial Physics to Inspire the Design of Novel Aircraft Engine Liners
… aircraft. This thesis investigates acoustic metamaterials and their ability to achieve superior transmission loss characteristics not found in traditional honeycomb liners. The acoustic metamaterials investigated are an array of Helmholtz resonators with and without coupled cavities …
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Seismic Analysis and Isolation Strategies for Spent Fuel Dry Storage Cask Systems
… need for robust containment of radioactive materials over extended operational periods to prevent damage and mitigate any potential releases. Based on a comprehensive review of existing literature, the study reveals that the global seismic responses of DSCs-such as sliding, rocking, and …
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Improving Response Characteristics of Split Ring Resonators Using Experimental Designs
… approaches. The design parameters of the meta-material device are examined to study all the main effects, the two factor interactions, and the curvature effects. A full factorial design and a central composite design is utilized for the study. The results in improving split ring resonator …
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Ordering of Nanoparticles by Wrinkle-Assisted Self-Assembly : Controlling Plasmonic Coupling Effects
… scale between 10Å and 1000Å are known as nanomaterials and have attracted immense interest over the last decades (Nobel Prize in physics in 2010 was awarded for the nanomaterial graphene). Materials within this scale show a large surface-to-volume ratio and amplify surface-related properties. …