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 10 of 10 for “"Dispersion Engineering"”.
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Concentric Microresonators Design For Dispersion Engineering and Scalable Electron-Beam Lithography for Si and SiN Photonic Platforms
… exhaustive parameter sweeps. This enables dispersion engineering in regimes previously inaccessible. On the fabrication side, a robust subtractive electron-beam lithography (EBL) process is established for the silicon-on-insulator (SOI) platform, enabling reliable pattern transfer from …
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Terahertz laser frequency combs : devices and applications
… by third order nonlinearity. With proper dispersion engineering, we have shown that it is possible to create QCL frequency combs at terahertz wavelengths, which possess broadband coverage in a compact package. These QCL combs are particularly attractive as sources for high-sensitivity …
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Design and optimization of chalcogenide waveguides for supercontinuum generation
… waveguides for wideband SC generation. Through dispersion engineering and by varying dimensions of the 1.8-cm-long ChG nanowires, we have investigated dispersion curves for a number of nanowire geometries and identified a promising one which can be used for generating a SC with 1300 nm bandwidth …
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Quantum Cascade Laser Frequency Combs
… manipulating the optical non-linearities through dispersion engineering, QCLs can be made to enter frequency combs states on-demand. By mixing two different frequency combs, absorption features at optically frequencies can be encoded into the radio-frequency domain, eliminating the need for …
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Metamaterials for High-Efficiency Photonic Integrated Circuits with Multiband Applications in Quantum and Fibre Communications
… the emergence of a new branch of electrical engineering now known as photonics. Since then, rapid population growth, the accelerated expansion of communication infrastructure, and the development of novel computing architectures have pushed classical electronics to their fundamental limits. …
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Development of Broadband Semiconductor Laser Frequency Combs
… system that can benefit from an integrated dispersion engineering solution. There are three major innovations proposed and implemented in each one of the aspects mentioned above. In terms of characterization, a novel integrated segmented source-DUT (device under test) structure was …
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Parametric Frequency Comb Generation In Visible And Mid-Infrared Wavelengths With Integrated Silicon Nitride Ring Resonators
… wavelength range. We overcome challenges in dispersion engineering by employing the crack isolation trenches in Chapter 3 to grow required film thicknesses, and we optically characterize materials in the MIR wavelength range. We also improve MIR losses by annealing films periodically …
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Nonlinear Applications using Silicon Nanophotonic Wires
… nonlinearity, flexible control of waveguide dispersion, and short free-carrier lifetime. All these advantages make silicon nanophotonic wires an ideal platform for a variety of nonlinear applications. The first part of my thesis study is focused on nonlinear applications in the telecom bands. …
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Silicon Photonics for All-Optical Processing and High-Bandwidth-Density Interconnects
… that enables completely offsetting the material dispersion and achieve dispersion profiles required for effective parametric interaction of waves in the optical structures. Chapter four primarily introduces and motivates nonlinear processing in communication applications and focuses on recent …
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Negative-group-delay and Non-foster Electromagnetic Structures
This PhD dissertation explores novel electromagnetic applications using negative-group-delay (NGD) and non-Foster structures and establishes an intimate connection between these two phenomena. As a result, novel implementations of non-Foster reactive elements using NGD networks are proposed. To …