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 679 for “"Photonics"”.
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SUPERRESOLUTION PHOTONICS
This thesis presents methods to improve imaging beyond the diffraction limit. Methods presented include spatial mode demultiplexing as well as image processing algorithms like Center of Gaussians.
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Nanophosphor-based Photonics
Phosphors are the materials that currently drive solid-state lighting (SSL). These photoluminescent materials act as color converters, converting light generated by blue or ultraviolet LEDs to lower energy light within the visible spectrum. This group of materials, consisting of inorganic matrices …
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Conical Diffraction Photonics
Recent interest in conical diffraction (CD) has led to a large increase in experimental and theoretical investigations over the last two decades, a marked change from the previous 160 quiet years in the field. Once dismissed as an optical curiosity, the phenomenon has emerged as a fascinating area …
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Analog integrated photonics
Silicon photonics promises to revolutionize the field of optics by allowing for cheap, compact, low-power and low-noise optical systems on chip. In the past decade and a half, the basic functionality and acceptable performance of many individual integrated photonic components have been …
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Broadband terahertz photonics
In recent years, quantum cascade lasers have emerged as mature semiconductor sources of light in the terahertz range, the frequency range spanning 1 to 10 THz. Though technological development has pushed their operating temperatures up to 200 Kelvin and their power levels up to Watt-level, they …
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Characterisation of silicon photonics devices
… together, the need for a material to build photonics integrated circuits (PIC) that can be cost-effective and be produced in mass market has become very important. This thesis describes and outlines the characteristics of high index contrast waveguides as a building blocks that can be …
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Polarization manipulation in silicon photonics
Silicon photonics is moving fast toward industrialization. It satisfies the increasing demand for higher speed, larger bandwidth communication. Thus it has a wide range of applications including high-performance computing, data center, telecom etc.. However, the on-chip (waveguide) and off-chip …
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Silicon-photonics for VLSI systems
… processor I/O. The key device for VLSI photonics is the optical microring resonator, a compact micrometer-scale device enabling energy-efficient modulation, DWDM channel selection, and sometimes even photo-detection. While these advantages have generated considerable interest in …
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Hybrid laser with CMOS photonics
In this thesis, an interesting approach for a photonic laser source is presented. By using integrated photonic resonators with an external gain medium, we are able to build a laser that offers a number of advantages including reducing the electrical and thermal load on the integrated chip socket, …
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LUMINESCENT COMPOUNDS FOR APPLICATIONS IN PHOTONICS
… compounds for potential applications in photonics, which can be defined as a branch of optics related with generation, modulation, detection, and processing of photons. It is divided in three parts, each concerning an independent project. In the first part, made in collaboration with …
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Lightwave circuits for integrated Silicon Photonics
… technological advancements in integrated silicon photonics circuits aimed at developing an All-On-Chip device for quantum photonics experiments. The work has been carried out within the framework of project SiQuro, where the Silicon-On-Insulator platform is chosen to integrate all the components …
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Second order nonlinearities in silicon photonics
In this thesis, second order optical nonlinearities in silicon waveguides are studied. At the beginning, the strained silicon platform is investigated in detail. In recent years, second order nonlinearities have been demonstrated on this platform. However, the origin of these nonlinearities was not …
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Smart photonics in imaging and sensing
In this dissertation, proposed and demonstrated are several smart imaging and sensing techniques for real-world photonic applications. First, the design of an embedded systems based laser beam imager and spectrum analyser deploying a Digital Micromirror Device is described and demonstrated. The …
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Nonlinear Photonics in Waveguides for Telecommunications
… been growing interest in the field of microwave photonics. We present the design and optimization of a waveguide with an EO polymer core and silica/sol-gel cladding. The effect of electrodes on the insertion losses and poling efficiency are also analyzed, and conditions for low-loss and high …
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Printable 2d Material Optoelectronics and Photonics
… for the next generation optoelectronics and photonics. Pairing 2d materials with printing is an emerging cost-effective large-scale device fabrication strategy. However, the current inks are far from ideal to support reproducible device fabrication. In addition, the instability of BP in …
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Photodetectors for graphene-based integrated photonics
… optical neural networks mature. While silicon photonics has emerged as a viable candidate to translate proof-of-principle demonstrations to mass-manufacturing, the fabrication of photonic integrated circuits (PICs) and their subcomponents remains highly heterogeneous, which drives up cost and …
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Novel materials for silicon based photonics
… mentioned functions. The development of silicon photonics has found its way through exploiting novel materials as hybrid platforms to manufacture various devices and systems. In this thesis, we focus on the development of novel material in emerging needs of broadband coherent light source and …
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Integrated erbium lasers in silicon photonics
… erbium-doped aluminum oxide lasers on a silicon photonics platform. A key achievement in this work is a scalable laser design for high output power and ultra-narrow linewidth performance. Using a novel wavelength-insensitive design, a CMOS compatible waveguide structure is proposed to achieve …
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