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 9 of 9 for “"slab waveguide"”.
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Theory, Design, and Fabrication of Diffractive Grating Coupler for Slab Waveguide
… between two waves in photoresist. The waveguide is fabricated from silicon nitride that is deposited by chemical vapor deposition. The diffraction grating recording assembly is described along with the grating coupler fabrication process. A grating coupler is fabricated with an input …
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Analysis and characterization of the integrated dielectric slab waveguide-wedge antenna using iterative mode-matching technique
… to the dielectric wedge antenna fed by a slab waveguide of the same material is presented. The method of solution involves modeling the wedge as a sequence of step discontinuities and using an iterative procedure to track forward and backward partial wave fields, expressed as modal …
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Optically Pumped Type-II Mid-Infrared Tunable Distributed Feedback Lasers
… was then transferred into the top clad of the slab waveguide epi-structure of the laser de- vice. Wavelength tuning is achieved by translationally projecting pump stripe at di\ufb00erent positions of this chirped grating on the laser device, thus di\ufb00erent grat- ing periods along the pump …
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Synthesis, design and characterization of a distributed feedback grating based non-linear optical chemosensor
… the Distributed Feedback (DFB) laser cavity. The waveguide materials synthesized are Si and Ti inorganic matrices that were optimized for optical waveguiding by determining the appropriate film thickness, refractive index and film smoothness. Amplified stimulated emission was achieved for a …
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Polaritonics : an intermediate regime between electronics and photonics
… propagation occurs within one or more of the slab waveguide modes of the crystal. Direct observation of phonon-polaritons is achieved using real-space imaging, which monitors and records the spatiotemporal evolution of phonon-polaritons within a ferroelectric crystal. The details of both …
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Designing Enhanced Nonlinearity in Plasmonic Devices with Epsilon-Near-Zero Films
… thin films integrated into plasmonic waveguide architectures as a route toward stronger light–matter interaction in compact nonlinear devices.</p> <p>Two waveguide geometries are examined: a hybrid metal-insulator-metal plasmonic slab waveguide incorporating an ultrathin indium tin …
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THz polaritonics : optical THz generation, detection, and control on a chip
… waves are generated directly in a thin slab of lithium niobate crystal where they can be amplified and guided. Time-resolved phase-sensitive imaging lets us capture movies of THz waves as they propagate at the light-like speeds. I developed polaritonics methodologies and used the …
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Double Negative Metamaterials in Dielectric Waveguide Configurations
… to DNG materials, proves to be dielectric waveguides. The present investigation, then, focuses on the inclusion of DNG materials in various planar dielectric waveguide configurations. These waveguides involve a core region surrounded by various numbers of symmetrically-placed cladding …
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Solutions et matériaux nouveaux pour guide d'onde Térahertz
… d’ondes à plaques parallèles (parallel plate waveguide-PPWG) avec des conditions de fermetures conducteur parfait (perfect electric conductor-PEC) -- graphène et graphène -- graphène a été analysée dans un premier temps. En considérant l'excitation du graphène par un champ électrique …