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 23 for “"degree of polarization"”.
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Analysis of signal-to-noise ratio of angle and degree of linear polarization in division of focal plane polarimeter
Recent advancement in nanofabrication technology has led to commercialization of single-chip polarization and color-polarization imaging sensors in the visible spectrum. Novel applications have arisen with the emergence of these sensors leading to questions about noise in the reconstructed …
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Second-harmonic generation-based Mueller matrix polarization analysis of collagen-rich tissues
Quantitative assessment of the properties of fibrillar collagen in tissue can yield deeper insight into structure-function correlations of the cell and its surrounding matrix. Second-harmonic generation (SHG) microscopy is especially well-suited as an image acquisition technique, due to its …
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Polarimetric Characterization Of Random Electromagnetic Beams And Applications
Polarimetry is one of the principal means of investigating the interaction of light with matter. Theoretical models and experimental techniques are presented in this dissertation for polarimetric characterization of random electromagnetic beams and of signatures of random media in different …
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Polarimetry Of Random Fields
… average quantities are accessible. The study of polarimetry is concerned with both the description of electromagnetic fields and the characterization of media a field has interacted with. The polarimetric information is conventionally presented in terms of second order field correlations which …
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The Scattering of H-alpha Emission Associated with the Rosette Nebula in the Monoceros Region Studied Using Polarimetry
Polarimetric CCD images of HII regions were obtained using a rotating polarizer device designed, built, and used in conjunction with the Spectral Line Imaging Camera (SLIC) at Virginia Tech's Martin Observatory in Giles County, Virginia. The SLIC uses a narrow bandpass interference filter coupled …
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Spatial correlations and partial polarization in electromagnetic optical fields : effects of evanescent waves
In this thesis, partial polarization and spatial correlation properties of electromagnetic optical fields are investigated. The emphasis is on near fields which exist only within the distance of the light wavelength from the emitting or scattering object. In the near-field region, the contribution …
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A polarized ≥He ion source: Measuring the polarization
… at Rice University which uses the principle of optical pumping to produce polarized He ions for extraction and acceleration. The design of an experiment to measure the degree of polarization of the ions is described. 3He+ ions are accelerated to an energy of approximately 300 keV and produce …
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Mueller-matrix-based analysis for second-harmonic generation imaging
… generation microscopy takes advantage of second-order nonlinear property for imaging of biological structures. Invoking quantitative image analysis techniques facilitates the assessment of tissues in varying states. This thesis presents a quantitative description of the relative …
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Polarization control and measurement with meta-optics
Metasurfaces are artificially engineered arrays of subwavelength phase-shifting elements which, if designed with explicit polarization dependence, provide a fascinating platform for new polarization optics. In this thesis, we present metasurface diffraction gratings designed to produce arbitrarily …
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A study of the polarimetric characteristics of planar chiral mesoscopic structures
… that chiral materials can rotate the direction of incident polarized light. This work focuses on a new way of investigating the polarized response of chiral metamaterial structures and nanoparticles. In the theoretical part of this work, fundamental concepts related to chirality are defined. …
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Theoretical Studies of L-shell X-ray Line Polarization and M-shell X-ray Spectroscopic Emission from Highly Ionized Xenon Ions
The field of high-energy-density (HED) physics has important applications, such as inertial confinement fusion and the development of intense radiation sources. X-ray plasma spectroscopy and spectropolarimetry are integral to the study of HED plasmas. Comparison of x-ray line emission spectra to …
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Nonlinear Interferometers for Quantum Information Processing and Metrology
… state with tunable properties in various degrees of freedom (DoFs) is always a challenging task in the field of quantum information processing. This arises from the fact that generating such biphoton state puts many constrains on the design and fabrication of the biphoton sources. In this …
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A Blue-Green Divide? Elite and Mass Partisan Dynamics in Taiwan
… dissertation aims to investigate the bases of partisan differentiation and degree of polarization since Taiwan's 2000 presidential election. By employing American concepts and theories of partisan polarization, I analyze Taiwan's party politics at both the elite and mass levels. At the elite …
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Optical coherence tomography for retinal diagnostics
… a cross-sectional image from a series of lateral adjacent depth scans, and with a two-dimensional scanning scheme, three-dimensional intensity image of sample can be constructed. Due to its non-invasive capability, OCT has been widely applied in ophthalmology, cardiology and …
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How The Public Perception Of Political Polarization Affects American Social Life
… country is deeply divided over politics and that polarization will only get worse. Americans also tend to overestimate the degree of polarization and political extremism. Such exaggerated perceptions of polarization are widespread, but we know little about their effects on our society. Existing …
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Modulation of Hydroxyl Radical Reactivity and Radical Degradation of High Density Polyethylene
Oxidative processes are linked to a number of major disease states as well as the breakdown of many materials. Of particular importance are reactive oxygen species (ROS), as they are known to be endogenously produced in biological systems as well as exogenously produced through a variety of …
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Recent Advances in Indole Aryne Cycloaddition Chemistry. Part I: Total Synthesis of (±)-cis-Trikentrin B. Part II: Investigation into the Regioselectivity of 6,7-Indole Aryne Cycloadditions. Part III: Synthesis and Reactions of Novel Tribromoindoles
… significance in achieving the total synthesis of biologically active indole alkaloid natural products such as the trikentrins and herbindoles in a facile manner. The application of 6,7-indole aryne cycloaddition methodology towards the total synthesis of (±)-cis-trikentrin B, one of the …
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Theoretical and Experimental Studies of Radiation from High-Z Multiply Ionized L-shell Ions with Emphasis on X-ray Line Polarization
… a detailed theoretical and experimental study of radiation from high-Z multiply ionized ions that are influenced by a diverse set of atomic processes. The implemented theoretical tools include relativistic atomic structure codes, to generate atomic databases and calculate x-ray line …
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Using cathodic protection to control corrosion of reinforced concrete structures
… from corrosion. However, due to the complexity of environmental conditions, the specifications in national and international standards are still open to discussion in engineering practices for their accurate suitability. To some extent, the design aspects are still based on practical experience. …
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