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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 18 of 18 for “"Optical computing"”.
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OPTICAL COMPUTING IN BOLTZMANN MACHINES
… theoretical and experimental work on applying optical processing techniques ot the operation of a Boltzmann machine. A Boltzmann machine is a processor that solves a problem by iteratively optimizing an estimate of the solution. The optimization is done by finding a minimum of an energy surface …
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Rapid Classification of Imaged Objects Using Molecular Factor and Multivariate Optical Computing
… based on molecular factor and multivariate optical computing. A simulation-driven design approach was utilized to develop a multimode infrared imaging system for chemical contrast enhancement. This infrared thermal imaging system is based on molecular factor (MFC) and lock-in computing …
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Plasmonics Using High Quality Epitaxial Graphene: An Approach towards Next-Generation Optical Computing
<p>Optical computing has been proposed for high performance applications owing to light's high frequency and noise tolerance. However, the diffraction limit of light prevents the shrinking of optical components to dimensions significantly smaller than the wavelength of light, typically µm's, …
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System Design, Construction, Implementation, and Validation For Rapid Single-Cell Classification Using Imaging Multivariate Optical Computing
… spectra are collected using a single-cell optical trapping instrument built in house. Linear discriminant analysis (LDA) has been used to classify individual phytoplankton cells based on the fluorescence excitation spectra for individual cells in the wavelength range 350-650 nm. …
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Three dimensional (3D) optical information processing
… with 3D structured media. Comparing to 2D optical elements where the light interacts with a sequence of surfaces separated by free space, 3D optical elements provides more degrees of freedom to perform imaging and optical information processing functions. With sufficient dielectric …
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Metasurfaces and Their Applications in Photonic Devices
<p>Metasurfaces are flat artificial optical elements composed of dielectric and/or metallic nanostructures. They can manipulate light in unprecedented ways by altering amplitude, phase, and polarization at subwavelength scales. The ability of these two-dimensional elements to perform multiple …
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Disordered Optics for Multidimensional Information Processing
… first part of the thesis is about diffractive optical elements (DOE) for spectral imaging. We designed a spatially modulated DOE filter that can efficiently sample in the Fourier transformed domain and facilitate spectral image reconstruction. The DOE layer distinguishes the main Fourier …
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LARGE AREA 3D PHOTONIC CRYSTALS WITH EMBEDDED WAVEGUIDES
… photonic crystals can demonstrate non-linear optical behavior if the crystal contains material that exhibits the optical Kerr effect or a nonlinear susceptibility \u03c7(2). These non-linear photonic crystals can be used for optical computing applications. Using the novel approaches presented …
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Photonic Crystals with Alternate Arrays of Rods and Holes in a Low Dielectric-Index Material
… for practical applications, especially on optical communications and computations. Since the wavelength range of light is on the same order of magnitude as the modulation periods of dielectric materials, an analogy of the light propagation in dielectric-constant modulated structures with …
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Evaporation-Driven Assembly as a Route to Photonic Materials
… chemosensors, to solar power applications, to optical computing devices. The range of proposed applications for photonic crystals demands a range of techniques for fabricating them, meeting differently weighted priorities including perfection, refractive index contrast, operating wavelength, …
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Exciton transport and coherence in molecular and nanostructured materials
Over the past 20 years a new classes of optically active materials have been developed that are composites of nano-engineered constituents such as molecules, polymers, and nanocrystals. These disordered materials have enabled devices such as organic light emitting diodes, color tunable lasers, and …
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Interferometry with higher-dimensional gauge-symmetric optical multiports
Optical interferometry is the controlled application of electromagnetic interference. While some interferometric techniques predate the advent of Maxwell's equations by centuries, a variety of contemporary methods find ever-improving use in areas such as optical sensing, signal modulation, imaging, …
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Analysis of Photonic Structures for Optical Networks
… de la Célula Lógica Programable Óptica (Optically Programmable Logic Cell, OPLC) basadas en Láseres de Pozo Cuántico, capaces de proporcionar diferentes funciones lógicas booleanas y se propone teóricamente un circuito de recuperación de la señal de reloj utilizando OPLCs. Finalmente, se …
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Multivariate Statistical Methods that Enable Fast Raman Spectroscopy
… of spectrometer, that uses computer-controlled optical filters to efficiently capture Raman photons and multiplex them onto either one or two photon counting detector(s). This method, referred to as optimal-binary compressive detection (OB-CD), allows for the collection of chemical information …
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Domain-Specific Analog Physical Computing Accelerators
… that a field-programmable gate array or optical-based design will produce the fastest generator. The majority of hardware uniform random number generators obtain their randomness from a non-uniform random physical process and then transform or truncate this process to produce a uniform …
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Diffraction-based Optical Architectures for Processing One-dimensional Data
… light as a fundamental resource, free-space optical computing and integrated photonic computing devices provide, respectively, powers of natural parallelism and miniaturisability. Recent work harnessing diffraction within slab waveguides has been proposed, on its face combining the best …
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SYNTHESIS AND CHARACTERIZATION OF NEW ORGANIC MOLECULES AND INORGANIC-ORGANIC HYBRID MATERIALS WITH INTERESTING LINEAR AND SECOND ORDER NON LINEAR OPTICAL PROPERTIES
… been achieved in the area of communications. Optical fibers, not copper cables, are already being used to carry huge amounts of information across the great oceans. However, among the three “C”s (communication, computing and control), communication is the only one that is currently implying …