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 7 of 7 for “"Metal Waveguide"”.
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Efficient THz lasers and broadband amplifiers based on quantum cascade gain media
… antennas and attaching silicon lenses at the metal-metal waveguide facets.
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Analysis and Design of Low-Cost Waveguide Filters for Wireless Communications
… research of this thesis is built around advanced waveguide filter structures. Waveguide filters and the waveguide technology in general are renowned for high power capacity, low losses and excellent electromagnetic shielding. Waveguide filters are important components in fixed wireless …
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Shielded Metal Waveguides with Uniform Electric Field Distributions
… uniformly distributed electric field within a metal waveguide. A rectangular waveguide centrally loaded with a dielectric product is investigated rst since rectangular waveguides are widely used and can be easily made as exposure chambers and applicators. Then a dielectric slab loaded …
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Surface-emitting distributed feedback terahertz quantum-cascade phase-locked laser arrays
… beam-pattern, single-mode THz emission from metal-metal waveguide quantum-cascade laser is proposed and implemented. Several surface-emitting distributed feedback terahertz lasers are coupled through the connection phase sectors between them. Through carefully choosing the length of phase …
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High-speed modulation of semiconductor lasers and properties of silver-coated quantum-dot lasers
… in which the optical field is confined by a metal waveguide instead of the more traditional dielectric waveguide. These devices show great promise because of their strong optical confinement and scalability below the diffraction limit. Both of these attributes are critical to future optical …
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From high power terahertz quantum cascade lasers to terahertz light amplifiers
… to the subwavelength confinement nature of the metal-metal waveguide used in most of the THz QC lasers, far-field beam patterns from lasers with simple Fabry-Perot waveguides are divergent and far from ideal Gaussian beams. The first part of this thesis describes the development of single-mode …
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Development of tunable terahertz quantum cascade wire lasers
… transverse wave vector, using a plunger made by metal (metal plunger) or silicon (dielectric plunger). When nudged close to the wire laser core, the metal plunger can push modes to the opposite side of the waveguide. Confined by a metal-metal waveguide, the mode is squeezed and the transverse …