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 11 of 11 for “"liquid crystal on silicon"”.
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Programmable Liquid-Crystal-on-Silicon Photonic Integrated Circuits with Millions of Degrees of Freedom
This thesis proposes a novel approach to photonics, wherein waveguides are formed entirely within a homogeneous liquid crystal layer using Liquid-Crystal-on-Silicon (LCoS) technology. Utilizing the electro-optical properties of LCs, we demonstrate the theoretical feasibility of inducing refractive …
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Adaptive optics aberrometer and wavefront corrector using a twisted-nematic liquid-crystal on silicon chip
Through the application of adaptive correction, both the permanent and changing aberrations of the eye that affect vision acuity are compensated for in order to provide diffraction-limited imaging. This thesis investigates the aspects of establishing an adaptive optics system for the correction of …
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Characterization of liquid crystal on silicon SLMs for in-situ Raman imaging for quality control of processed lunar regolith
In-Situ Resource Utilisation (ISRU) will be of great importance for future space missions. Some mission projects will only be possible through the integration of resources gathered during the mission. The use of lunar regolith as a construction and shielding material is particularly important in …
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Middle infrared beam-steering using liquid crystals for spatial light modulation
… is attractive for a number of applications, particularly in the defence sector, where infrared countermeasures are a cornerstone in protecting lives and assets from infrared seeking weapons. Liquid crystal based alternatives to the current opto-mechanical state of the art are …
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Electrically Tunable Liquid Crystal–Metasurface Devices for Phase Modulation in Telecom Band
Phase modulation of light is essential for reconfigurable photonic applications like display and optical communication. In liquid crystal on silicon (LCoS) devices, it is achieved by tuning the effective refractive index of the liquid crystal (LC) material. However, realising a full 2π shift …
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Ultrafast laser fabrication of a K-band integrated optic 2-telescope beam combiner for astronomical interferometry
This dissertation explores the vast potential of the ultrafast laser inscription (ULI) fabrication technique for astrophotonics applications. A fibre-connectorised K-band 2-telescope integrated optics (IO) beam combiner is designed and fabricated in commercial Infrasil® glass (IG) to update the …
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All-Optically Addressed Spatial Light Modulator and Diffractive Optical Element Based on Photoalignment of Azobenzene Polymer
The advancement of true three-dimensional (3D) displays hinges on the development of diffractive optical engines with high information bandwidth. However, conventional optical engines such as liquid crystal on silicon (LCOS) spatial light modulators (SLMs) and optically addressed SLMs (OASLMs) face …
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Enhance of LCOS Phase Modulation in Visible Wavelength Range Based on Metasurface
This thesis explores the integration of metasurface with liquid crystal on silicon (LCOS) technology to enhance the phase modulation capability while reducing the thickness of the liquid crystal layer, addressing key challenges in high-performance holographic displays. LCOS devices are known for …
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Phase and Polarization Modulations based on LCOS SLM
Liquid crystal on silicon (LCOS) technology has initially been developed for imaging and display applications. This technology combines the unique light-modulating properties of liquid crystal materials and the advantages of high-performance silicon complementary metal oxide semiconductor (CMOS) …
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Orbital angular momentum encoding/decoding of 2D images for scalable multiview colour displays
Three-dimensional (3D) displays project 3D images that give 3D perceptions and mimic real-world objects. Among the rich varieties of 3D displays, multiview displays take advantage of light’s various degrees of freedom and provide some of the 3D perceptions by projecting 2D subsampling of a 3D …