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 46 for “"Photonic Structures"”.
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Periodic subwavelength photonic structures
… interaction of light with periodic dielectric structures are investigated. The first application is large-area spectroscopy, for which we use the mid-field diffraction pattern generated by the light source passing through a transmission grating to determine its spectral composition. By …
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Analysis of Photonic Structures for Optical Networks
… bistable devices made of bulk and quantum-well structures based on numerical and computational simulations; and analyzes optical regenerators devices based on experimental measurements. A theoretical model of the optical gain in bulk and quantum-well semiconductor structures has been developed …
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Novel quantum dot and nano-entity photonic structures
… derived matrices, aiming to produce integrated photonic structures. Its objectives embrace the synthesis and the investigation of photonic materials, together with alternative fabrication methodologies enabling the effective integration of functional nanocomposite photonic structures, such as …
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Classical and quantum nonlinear optics in confined photonic structures
… associated with high-order soliton breakup in photonic crystal fibres and squeezed state generation in three dimensional photonic crystal microcavities are investigated. In both cases, the properties of periodically patterned, high-index contrast dielectric structures are engineered to control …
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Complex photonic structures in nature: from order to disorder
… materials. The occurrence of such structures in nature has been known for over a century, but it is only in the last few decades that the study of natural photonic structures has fully matured due to the advances in imagining techniques and computational modelling. Even though a …
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Leveraging free carriers effects for infrared photonic structures and devices
In this work, three types of novel photonic devices/structures were developed. The first one is a metal grating structure that combines the characters of ‘moth-eye’ structure and an extraordinary optical transmission grating. Therefore it has the capability to provide a uniform electrical …
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Terahertz Time-Domain Spectroscopy of Low-Dimensional Materials and Photonic Structures
… of THz mirrors based on one-dimensional photonic crystals consisting thermoplastic polymers and BaTiO3 nanoparticles. Stop bands have been achieved in the THz region, and the results agree well with the prediction of the transfer matrix method. </p><p>The main focus of this thesis is to …
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Advancing porous heat transfer materials and polymer coatings with photonic structures
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Modeling the interaction of light with photonic structures by direct numerical solution of Maxwell's equations
… Both are then applied to the modelization of photonic and plasmonic structures interacting with light. These systems are often too complex, either geometrically and materially, in order to be mathematically tractable and an exact analytic solution in closed form, or as a series expansion, …
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On-chip silicon based photonic structures : photonic band gap and quasi-photonic band gap materials
This thesis focuses on integrated silicon based photonic structures, photonic band gap (PBG) and quasi-photonic band gap (QPX) structures, which are based on high refractive index contrast dielectric layers and CMOS compatibility. We developed a new type of silicon waveguide - Photonic Crystal (PC) …
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Modeling silicon photonics process variations using ring resonator devices
Silicon photonics is an emerging industry that aims to implement photonic systems using extensions to traditional CMOS process technologies. With silicon technologies being used to transmit light, there exists a need by designers to understand the performance of standard silicon photonic elements …
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Topological photonic metasurfaces for light manipulation and strong light-matter interaction
… for implementation of the various designs of photonic structures which exhibit exciting physical phenomena in the optical domain. A straightforward fabrication of on-slab nanostructures is advantageous for integration with various photonic on-chip devices. Last decade all-dielectric periodic …
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Design and fabrication of micro- and nano- dielectric structures for imaging and focusing at optical frequencies
… work, design and fabrication of micro- and nano-photonic structures both in the diffraction regime and sub-wavelength regime have been investigated. In the diffraction regime, two types of optical systems and optical elements were investigated for application in LCD manufacturing. With the …
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Enhancing the functionality of photovoltaic and photonic biointerfaces through structuration
… two uncovers surprising design principles of photonic structures on flower petals and presents research tools to study disordered optical systems. Biophotovoltaics (BPV) is a newly described biophysical effect in which a biofilm of photosynthetic microorganisms associated with an anode …
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Designing plasmonic structures
… and results used in the design of various photonic structures. The emphasis of this thesis is in the theoretical and computational methods employed in the design. Many structures were fabricated and experimentally characterized confirming simulation results. Theoretically, surface plasmons …
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Simulation of polymer solar cell characteristics by amps-1d
… layer materials. Analysis of Microelectronic and Photonic Structures One Dimension (AMPS-1D) is a computer simulation tool for solar cell device characteristics. The first part of this study focuses on the performance and comparison of current-voltage (I-V) simulations of indium oxide (In_2O_3) …
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