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 16 of 16 for “"Space Imaging"”.
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DIRECT REAL-TIME REAL-SPACE IMAGING OF ENERGY TRANSPORT IN ORGANIC SEMI-CONDUCTORS
Efficient energy transport and charge separation in organic semi-conductors are of vital importance in natural light harvesting for photosynthesis and have huge implications for designing a new generation of organic optoelectronic devices such as photovoltaics, light emitting diodes, sensors and so …
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Reciprocal space phase gradient neutron imaging
Perfect crystal real space imaging has limitations in its resolution imposed by position sensitive detectors. The disadvantage, its limited resolution, of a position-sensitive detector can be overcome by replacing the conventional detector with an area detector and moving to reciprocal space. …
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Staged attitude-metrology pointing control and parametric integrated modeling for space-based optical systems
… in astronomy demands larger and more complex space imaging systems. This thesis presents the concepts developed for two different technologies that have the potential to contribute in improving the performance of space imaging systems. The first technology is precision pointing control …
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Nuclear magnetic resonance microscopy and diffusion
… with a home-built high resolution microscopy imaging probe. It is one of the most stable microimaging system designed and fully equipped for microscopic fMRI study. This work is an advancement of using MRI to study fundamental neuron science and cell signal pathways in vivo. NMR Microscopy of …
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Polaritonics : an intermediate regime between electronics and photonics
… 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 broadband and narrowband phonon-polariton generation and propagation in bulk and thin film crystals are …
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A Cavity-Coupled Rydberg Atom Array for Quantum Science and Quantum Computing
… and atom survival compared to conventional free-space imaging methods. I then introduce a new technique for selectively controlling atom-cavity coupling on arbitrary subsets of the array, using local AC Stark shifts on the excited states of the atoms. Building on these tools, I demonstrate fast, …
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Implementation and Analysis of 3-D Tomographic Reconstructions from Space-Based Imaging Platforms
Imaging satellites that look nadir face a variety of obstacles. In addition to designing the system for the intense environment that the satellite will be experiencing, there are other factors to consider: reflections and emissions from the ground, from clouds, and from the OH-airglow layer. …
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Active Dynamic Analysis and Vibration Control of Gossamer Structures Using Smart Materials
Increasing costs for space shuttle missions translate to smaller, lighter, and more flexible satellites that maintain or improve current dynamic requirements. This is especially true for optical systems and surfaces. Lightweight, inflatable structures, otherwise known as gossamer structures, are …
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Probing light-matter interactions with differential polarizations: From chiral nanostructures to molecular sensing
… lattices is characterized using hyperspectral k-space imaging. Multiple finite lattices fabricated on a single substrate are individually resolved and spectrally analyzed, demonstrating a viable pathway for multiplexed sensing of different analytes or environmental conditions. Collectively, these …
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Implementing Solvothermally Synthesized Carbon Nanodots into Dye-Sensitized Solar Cells to Enhance External Quantum Efficiency in the Ultraviolet
… are confirmed by optical measurements and real-space imaging of CNDs, derived from a fully hydrothermal reflux carbohydrate conversion of D-glucose, both before and after filtration via 20kDa molecular weight cutoff (MWCO) dialysis in water. Synthesis of these CNDs, from the bottom-up …
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Photogating Effect and Diffractive Optics in Low-Dimensional Structures
… our understanding of the earth's climate and space imaging. This kind of advancement is made possible through the thorough understanding of the performance of these devices which are fabricated from low-dimensional materials such as graphene, as well as the interaction of light with the …
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Ultrathin metasurface devices for phase and polarization control
… to the world (e.g., negative refraction, super imaging and cloaking). However, the application of 3D metamaerials in the optical range is limited by current nanofabrication techniques. As 2D counterparts of metamaterials, metasurfaces, which are comprised of a single layer or a stack of several …
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Atomic resolution studies of oxide superlattices and ultrathin films
… electron microscopy (STEM) allows for real space imaging of materials with directly interpretable atomic number contrast. Electron energy loss spectroscopy (EELS), together with STEM, can probe the local chemical composition as well as local electronic states of transition metals and oxygen. …
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Novel etch studies and passivation techniques on InAs/GaSb superlattice based infrared detectors
… today are being utilized for a variety of imaging applications such as medical diagnostics, navigation instruments of automobiles and aircrafts, meteorological imaging, night-vision and fog/smoke imaging, surveillance, target acquisition and astronomical/space imaging. These wide ranging …
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A Political History of U.S. Commercial Remote Sensing, 1984-2007: Conflict, Collaboration, and the Role of Knowledge in the High-Tech World of Earth Observation Satellites
… Since then, the high technology of earth imaging satellite systems has generated intense debates and policy conflicts, primarily centered on U.S. government concerns over the national security and foreign policy implications of high-resolution commercial satellite systems. Conversely, …
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IMAGING INTERFEROMETRIC MICROSCOPY TO THE LIMITS OF AVAILABLE FREQUENCY SPACE
Imaging interferometric microscopy (IIM) is a synthetic aperture approach offering the potential of optical resolution to the linear systems limit of optics (~lambda/4n). IIM allows one to resolve structures not accessible in a conventional illumination setup, while using a low NA microscope …