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 22 for “"Light modulators"”.
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Novel Electro-Optical Light Modulators
Made available in DSpace on 2014-12-08T22:23:42Z (GMT). No. of bitstreams: 1 6503686.pdf: 2566448 bytes, checksum: 994ad6539b11d31ffc368638c07e1641 (MD5) Previous issue date: 1964
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Solution-Processed ZnO Nanoparticles for Optically Addressed Spatial Light Modulators and Other Applications
… on record of optically addressed spatial light modulators (OASLMs) using solution-based ZnO NP as photoactive material. ZnO is a popular type of semiconductor compound from II-VI group and ZnO NPs are the nanocrystalline form of ZnO, which exhibit many unique and superior properties such …
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The development of a prototype Zone-Plate-Array Lithography (ZPAL) system
… the integration of micromechanical spatial light modulators with an existing zone-plate-array testbed lithography tool. The system development requires an efficient data-delivery system to promote throughput and a thoughtful optical channel to optimize the lithographic performance of …
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Characterization of liquid crystal on silicon SLMs for in-situ Raman imaging for quality control of processed lunar regolith
… using Crystal on Silicon (LCoS) as spatial light modulators for laser spectroscopy. These spatial light modulators use liquid crystal technology for their design. Unlike mechanical scanners, it has no moving parts subject to failure from shock and vibration. To extend the capabilities of a …
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Phase optimised general error diffusion for diffractive optical component design
… fast switching speeds of liquid crystal spatial light modulators.
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Diffractive optics for maskless lithography and imaging
… is modulated independently by means of spatial-light modulators. This essentially creates a "parallel laserwriter". In addition, this lithography system can be converted into a parallel-confocal microscope, which enables fast, high-resolution imaging. This thesis addresses the performance of …
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Contribución al estudio y desarrollo de arquitecturas para interconexionado óptico de señales y reconocimiento de imágenes
… and di®erent kinds of Liquid- Crystal Spatial Light Modulators, to create ¯xed and dynamic spot array generators for optical interconnects purposes. The second system demonstrates an acousto-optic crossbar switching network. The 12 £ 12 crossbar switch is supported by a complete 1.2 Gb/s …
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Low-Cost Spatial Light Modulator for Applications in Free-Space Optical Communication
Spatial Light Modulators (SLMs) are core components deployed for Adaptive Optics (AO) to compensate for atmospheric distortions. AO is an enabling technology for Free-Space Optical Communication, whose performance is severely degraded by the atmosphere. This thesis proposes two low-cost AO …
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Fast Response Liquid Crystal Devices
… (LC) has been widely used for displays, spatial light modulators, variable optical attenuators (VOAs) and other tunable photonic devices. The response time of these devices is mainly determined by the employed liquid crystal material. How to obtain fast response for the LC devices is a …
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Multidimensional fiber quantum light sources and their applications
… of multidimensional optical fiber-based quantum light sources. We study spontaneous four-wave mixing processes in optical fibers that can create photon pairs correlated in spatio-spectral degrees of freedom. Utilizing spatial light modulators, we show control over individual spontaneous four-wave …
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Resonant Spatial Light Modulation: Optical Programming and Sensing at the Fundamental Limit
… yet remains an open goal for present-day spatial light modulators (SLMs), active metasurfaces, and optical phased arrays. Here, we develop wavelength-scale, high-finesse photonic crystal cavity arrays as a solution to this problem. Specifically, we demonstrate nanosecond- and femtojoule-order …
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Particle Manipulation Via Optical Forces and Engineering Soft-Matter Systems With Tunable Nonlinearities.
One of the most intriguing properties of light-matter interaction is the ability of an electromagnetic field to exert mechanical forces on polarizable objects. This phenomenon is a direct consequence of the fact that light carries momentum, which in turn can be transferred to matter. Mediated by …
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Flexo electro-optic Liquid Crystals for Phase Modulation
… industry and are highly desirable as spatial light modulators because of their polarisation independence and fast switching. However, these types of devices suffer from multistep fabrication conditions and require high threshold voltages. To overcome these limitations, two key points were …
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Optimisation of Phase-Only Computer-Generated Holograms
… wavefront of 3D objects and generates a full 3D light field with true depth cues, which has the potential to provide an unparalleled sense of depth and immersion. However, the practical realisation of holographic displays faces significant challenges due to the limitations of existing …
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All-optical metamaterial modulators : fabrication, simulation and characterization
Artificially structured composite metamaterials consist of sub-wavelength sized structures that exhibit unusual electromagnetic properties not found in nature. Since the first experimental verification in 2000, metamaterials have drawn considerable attention because of their broad range of …
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All-Optically Addressed Spatial Light Modulator and Diffractive Optical Element Based on Photoalignment of Azobenzene Polymer
… such as liquid crystal on silicon (LCOS) spatial light modulators (SLMs) and optically addressed SLMs (OASLMs) face scalability limitations in achieving smaller pixel sizes, wider diffraction angles, and greater information transmission capacity due to their reliance on electrical driving …
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Optical polarization control in free space and through random media using wavefront shaping
Light is widely used in areas such as optical communications, micro/nano fabrication, industrial process control, material characterization, and biomedical imaging. The usefulness of light in these areas depends on the dexterity with which the state of the optical field, defined by the …
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Improving Image Quality in Holographic Projections through Novel Iterative Algorithmic Solutions
… of view, limitations in hardware, with spatial light modulators mostly capable of modulating either the amplitude or phase of light, or its subpar image quality, have delayed its introduction and success in the mass market. This work focuses on the latter problem, finding novel algorithmic …
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