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 “"subwavelength structures"”.
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Optimal wavefronts and subwavelength structures : computer-aided design for optics and acoustics
… this thesis is to design optimal wavefronts and subwavelength structures that enhance mechanical effects on the nanoscale, focusing on three types of devices: holographic optical tweezers, broadband solar absorbers, and acoustic waveguides. Much of the work presented is obtained using open source …
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Silver (Ag) nanoparticle based masks for the development of antireflection subwavelength structures in GaAs and Si solar cells
… as masks for the development of antireflection subwavelength grating (SWG) structures. We particularly investigate the impact of silver thin film thickness and the effect of annealing temperature on the fabrication of silver nanoparticles of controlled size and spacing distributions. We also use …
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Fabrication of anti-reflective and imaging nanostructured optical elements
… range of breakthrough pressures by virtue of subwavelength structures patterned on their respective surfaces; similar examples of organisms exploiting geometry to attain properties unavailable in bulk materials are abundant in nature. These instances have inspired applications to man-made …
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Designing Plasmonic Materials And Optical Metasurfaces For Light Manipulation And Optical Sensing
… do not exist in nature. They are assemblies of subwavelength structures that are tailored in size, shape, composition, and orientation to realize the desired property. Metamaterials are promising for applications in diverse areas: optical filters, lenses, holography, sensors, photodetectors, …
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Tunable Linear and Nonlinear Metasurfaces Based on Hybrid Gold-Graphene Plasmons
<p>Optical Metasurfaces are planar structures that are patterned with subwavelength structures and are very thin compared to the wavelength of light. Despite their thinness, these structured materials can strongly interact with incident light to effect the functionalities of conventional optical …
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Metal-insulator-insulator-metal plasmonic waveguides and devices
… have been proposed for highly integrated subwavelength structures. In this work, waveguiding and coupling of surface plasmon polaritons (SPPs) within finite planar MIM plasmonic waveguides are examined both theoretically and experimentally. Gain (dye-doped polymer)-assisted MIM waveguides …
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Fabrication and photonics properties of III-V semiconductor nanowire structures
… axis. In addition, semiconductor nanowires with subwavelength structures exhibit strong optical Mie resonance, making them ideal platforms for realizing novel optical devices, such as extreme solar energy absorbers and broadband light trapping devices. This special 1D optical Mie resonance can be …
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Surface-emitting lasers for communications: novel metal-cavity microlasers and high-contrast-grating tunable VCSELs
… as one-dimensional or two-dimensional metastructures integrable on surface-emitting lasers. A wide range of optical functionalities such as broadband reflection, high-Q resonance, filtering, beam-steering, focusing, beam-conversion, and generation of photon orbital angular momentum are …
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Unified conformal/nonconformal domain decomposition methods for solving large-scale multi-region electromagnetic problems
In this dissertation, robust and efficient numerical algorithms are developed based on the dual-primal finite element tearing and interconnecting (FETI-DP) method for the full-wave analysis of large-scale electromagnetic problems in three dimensions. These algorithms are designed to expand the …