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 11 of 11 for “"Split ring resonator"”.
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Split Ring Resonator (SRR) based metamaterials
… than that of the wavelength of light. The Split ring resonator (SRR) is such a nanostructure that forms the basic unit of a metamaterial. Since the dimensions of the SRRs are required to be smaller than the resonance wavelength, it becomes critical when response is required at the near …
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Frequency and Field Strength Materials Characterization with Complementary Split-ring Resonators, Coplanar Waveguides, and the Virtual Ground Method
In the radiofrequency bands, measuring the power-dependent complex permittivity and permeability of materials that undergo metal–insulator transitions is a significant challenge which is important for defense and commercial applications. This thesis attempts to articulate barriers in the prior art, …
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Theory, Simulation, Fabrication and Testing of Double Negative and Epsilon Near Zero Metamaterials for Microwave Applications
… metamaterials are shown to have unique filtering properties and exhibit negative refraction and "backward wave" propagation. The "backward wave" phenomenon describes the anti-parallel nature of phase velocity and group velocity in a negative index metamaterial and can be additionally …
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Improving Response Characteristics of Split Ring Resonators Using Experimental Designs
… of experiments approaches in the analysis of split ring resonators, and to compare two different 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 …
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Leveraging free carriers effects for infrared photonic structures and devices
… circuit. It consists a microstrip busline and a split-ring resonator that is capacitively coupled to the busline; the RF circuit is built on a semiconductor substrate, with the great flexibility of changing the underlying material system by epitaxial growth. We experimentally investigated the …
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Sonic Crystal Noise Barriers
… As a result of multiple (Bragg) scattering, SCs exhibit a selective sound attenuation in frequency bands called band gaps or stop bands related to the spacing and size of the cylinders. Theoretical studies using Plane Wave Expansion (PWE), Multiple Scattering Theory (MST) and Finite …
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Nonlinear terahertz spectroscopy of electronic and vibrational responses in condensed matter systems
… observed nonlinear free-carrier absorption, occurring through the saturation of free-carrier mobility in bulk semiconductors. We have demonstrated that highly energetic electrons in the conduction band can generate electron-hole pairs in indium antimonide, and have elucidated the dynamics of the …
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Terahertz metamaterials for sensing and detection
… terahertz frequencies was investigated including split-ring resonators, perfect absorbers, and flexible absorbers. The devices were designed through simulation by finite element method commercial software and fabricated by photolithographic lift-off process using electron beam evaporation for the …
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Novel microwave devices based on multi-port filtering networks
… on the novel device concept of Multi-Port Filtering Networks (MPFNs). This is a concept derived from conventional two-port filters to link two or more filters in communication systems. It is interesting to the microwave filtering component designers as it reduces the footprint, cost and …
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Solidification of eutectics utilizing directional solidification and confining templates for optical metamaterial applications
… begins to deviate from the naturally occurring lamellar microstructure. The direction of solidification, the solidification speed, and the surface energies of the two phases all play a role in what the final microstructure shapes looks like. At certain solidification speeds and pillar …
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Graphene Integrated Metamaterial Devices for Terahertz Modulation
… are required to solve the unique engineering problems associated with operating in this frequency regime. This thesis will look to design and develop novel device architectures using metamaterial arrays to strongly couple with THz radiation, whilst implementing electrically tunable …