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 12 of 12 for “"integrated optical devices"”.
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Temperature and Spatial Hole Burning Effects in Semiconductor Lasers and Integrated Optical Devices
… in long-wavelength InP-based lasers and integrated optical devices, including Fabry-Perot (FP) lasers, distributed-feedback (DFB) lasers, and integrated electroabsorption modulator with DFB lasers (EML). First, the temperature dependence of bulk InGaAsP semiconductor laser diodes is …
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Development of X-ray lithography and nanofabrication techniques for III-V optical devices
… fabrication techniques for Bragg-grating-based integrated optical devices in III-V materials. Work on this rich family of devices has largely been limited to numerical analysis because of the difficulties of their fabrication. The challenges of fabrication are addressed by dividing the problem …
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Nanometer-precision electron-beam lithography with applications in integrated optics
… accuracy remains inadequate for future integrated-circuits and integrated-optical devices. Environmental disturbances, system imperfections, charging, and a variety of other factors contribute to pattern-placement inaccuracy. To overcome these limitations, spatial-phase locked …
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Optofluidic Bragg grating sensors for chemical detection
… focussed UV beam to fabricate a wide range of integrated optical devices. One such device, the Bragg grating, can be used as an optical sensor for changes in refractive index. This thesis reports upon the advancements made to such optical Bragg grating devices towards the development of …
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Integrated photonics for imaging: novel sources, architectures and applications
Integrated photonics is considered a promising technology to tackle many current technological bottlenecks including data communication, computation, sensing and healthcare. Consequently, significant efforts have been dedicated to the study of integrated optical devices and systems for these …
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Low Loss Orientation-Patterned Gallium Arsenide (OPGaAs) Waveguides for Nonlinear Infrared Frequency Conversion
… allowing for the manufacture of nonlinear integrated optical devices such as waveguides. By confining the nonlinear pump beam throughout the length of a waveguide one can achieve very high field intensities while at the same time overcoming the diffraction normally associated with tight …
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Writing and characterisation methods for UV-photosensitivity based devices and their applications
… investigation of photosensitivity mechanisms in optical fibres and planar waveguides for the fabrication of advanced integrated optical devices for telecoms and sensing applications. One major scope is the improvement of grating fabrication specifications by introducing new writing techniques and …
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The Effect Of Stationary UV Excitation On The Optical Behavior Of Electrochemically Self-Assembled Semiconductor Nanowires
In this work, we investigate the optical response of the semiconductor quantum wire array when excited by stationary UV light. The array is synthesized by selectively electro-depositing the semiconductor material in electrochemically self-assembled porous alumina templates. Our studies are based on …
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The control of gold and latex particles on optical waveguides
The trapping of microparticles by optical methods using a focussed laser beam, known as optical tweezers, has evolved rapidly in the last thirty years. However this process is limited to the trapping of a small number of particles. Evanescent wave trapping allows simultaneous trapping of many …
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Engineering of integrated devices on electro-optical chip: grating couplers, algorithms, and switches
… wires. The conversion of electrical signals to optical signals has been proposed in the future electro-optical computers as a way of addressing this issue. Much work has gone into the design, fabrication, and testing of components of new optical elements that can be implemented in chips …
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Optics-Based Quantum Information and Sensing Platforms Utilizing the Nitrogen-Vacancy Center in Diamond
… forming a localized-electron system with unique optical and spin properties. In particular, optical control and read-out of the spin state, combined with long spin coherence times, make it an attractive candidate for both high-sensitivity magnetometry and as a solid-state spin qubit for quantum …
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Structure and properties of transparent conductive ZnO films grown by pulsed laser deposition (PLD)
… its potential applications including nonlinear optical devices, blue‐violet emission device, buffer layer for GaN‐based devices, visible‐range transparent electrodes for solar cell and flat panel displays, surface acoustic wave devices, piezoelectric and piezooptic devices, gas sensors for …