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 20 of 51 for “"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 infrared …
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Modeling silicon photonics process variations using ring resonator devices
… However, these models do not take manufacturing variations into account and are assumed to be ideal. This thesis establishes the use of models for photonic structures that take spatial and random variations from manufacturing into account. More specifically, we demonstrate two elements of a …
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Measurements of Fresnel-drag using a passive ring resonator technique
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1983.
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Modeling and simulation of silicon photonics based optical ring resonator biosensor
… and photodetector. In recent decades, optical ring resonators gained importance as one of the promising biosensors due to miniaturized size and fast response. The optical ring resonator identifies the intended molecules or biochemical molecules by assessing the change in light behavior and that …
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Microwave ring resonator based on thermoplastic substrate for chicken breast meat quality identification application
… was applied to develop a single-port microwave ring resonator (MRR) based on the thermoplastic substrate for meat quality identification. Recently, the quality of meat, especially chicken meat, has sparked an interest in both the producers and the consumers, due to the increasing trend of …
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Crosstalk and Signal Integrity in Ring Resonator Based Optical Add/Drop Multiplexers for Wavelength-Division-Multiplexing Networks
… the crosstalk suppression ratio is proposed in ring resonator based OADMs. Ring resonators have a small ‘real estate’ requirement and are, therefore, potentially useful for large scale integrated optical systems. A number of approaches such as over-coupled rings, vertically-coupled rings and …
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Nonlinear aluminum nitride photonic crystal measurement using tapered fiber
… conversion between infrared and visible light. A ring resonator with a top layer of aluminum nitride, a material with high second order susceptibility, can achieve an efficient coupling between 780 nm visible light and 1550 nm infrared light. A tapered region is also integrated to improve the …
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Integrated optical switching using titanium nitride micro electromechanical systems
… systems (MEMS). The device consists of a ring resonator add-drop filter and a conductive MEMS bridge which is actuated by electrostatic force. Introducing conductive material into the electromagnetic evanescent field of the ring waveguide results in loss in the propagating light within, …
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Chip-based photonic sensors for metrology and applications
… small scale and low cost sensors, such as ring resonator, disk resonator, Mach-Zehnder interferometer, photonic crystal, directional coupler, grating, etc. In this thesis we focus on two types of photonic sensors, micro-ring resonator and high contrast grating membrane, including their …
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Numerical modelling of optical micro-cavity ring resonators for WDM networks
… improve the performance of optical microcavity ring resonators (MRRs) have been thoroughly investigated and new configurations have been proposed. The Multiresolution Time Domain (MRTD) technique was further developed and employed throughout this thesis as the main numerical modelling technique. …
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Low Loss Integrated Photonic Devices and Their Applications in Astrophotonics and Quantum Information
… etch masks, and different etching gases. Using a ring resonator, the waveguide loss has been extracted and reduced from 0.33 dB/cm to 0.18 dB/cm. Moreover, we explore aluminum nitride (AlN) on sapphire as a new platform for integrated photonics devices. A special fabrication process for the …
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Non-invasive alcohol and glucose detection using microwave resonators
… sugar detection for diabetes using microwave resonators. The system is based on microwave resonators using very low power sources (lmW). This PhD project explores the limits and feasibility of a rectangular cavity resonator and a microstrip suspended ring resonator for use with water/ethanol …
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Graphene Modulators for Silicon Photonic Optical Links
… a graphene-based electro-absorption modulator, ring resonator modulator, and Mach-Zehnder modulator. The double-layer structure enables the absorption and phase of an optical carrier signal to be electrostatically controlled without the need for doped waveguides. This is the most efficient …
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Integrated optical analog-to-digital converter
… optical ADC, two of its critical components - ring resonator filter bank and fiber-to-chip coupler -are designed. A novel coupler from a standard single mode fiber to a strongly confining silicon waveguide is proposed. The results of characterization of the filter bank and fiber-to-chip coupler …
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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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Materials and devices for optical switching and modulation of photonic integrated circuits
… was utilized to control switching in planar ring resonator waveguide structures. A switch extinction ratio of 15 dB, switch speed of 60 is and 1 mW operating power were demonstrated. A metal-insulator transition material, V02, was identified as a material with potential for enhancing the …
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Investigating thermal dependence on monolithically-integrated photonic interconnects
… thermal sensitivity of the essential optical ring resonator imposes constraints on the applicability of optical links in the electro-optical systems. To investigate the thermal dynamics as well as to develop advanced ring thermal-tuning mechanisms, real-time thermal monitoring at design stage …
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Improving Response Characteristics of Split Ring Resonators Using Experimental Designs
… 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 central …
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A fast 3D full-wave solver for nanophotonics
… many devices of interest, such as optical ring resonator filters or waveguides, have channels that can not be terminated without generating numerical reflections. Therefore, designing absorbers for these channels is a new problem for integral equation methods, as integral equation methods …
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