PhD Thesis Defense: Nonlinear Frequency Conversion in III.
Following a PhD in semiconductor ring lasers (1989-1992) at Glasgow University, UK, Thomas Krauss initiated research on planar photonic crystals in 1993. His work on fundamental concepts in photonic crystals, including his Nature paper in 1996, was pivotal for transforming photonic crystals from a scientific curiosity to the essential building block in photonics that they are today.
Our photonic crystal design reaches 67% of the performance of an ideal emitter. To further improve the omnidirectional performance, we fabricated a filled-cavity emitter, which experimentally demonstrated the theoretical prediction that HfO2-filled photonic crystals would have superior hemispherical in-band emissivity. Both fabricated photonic.
Development of novel infrared photonic materials and devices Zoe Louise Bushell Submitted for the degree of Doctor of Philosophy Department of Physics University of Surrey May 2017. 2 ABSTRACT This thesis investigates a range of novel photonic devices and their constituent semiconductor materials with emission in the infrared (IR) region of the spectrum. These have a variety of potential.
A slow variation in the structure of these crystals will lead to the bandstructure shifting, with an photonic analogy of electronic Bloch oscillations and Wannier-Stark ladders being seen in these structures. The two dimensional photonic crystals will be shown, through Hamiltonian ray tracing, to support both stable and chaotic ray paths.
I also consider a third, more traditional type of photonic crystal, in the form of a grating for surface coupling. In this thesis, I address many of the aspects of passive photonic crystals, from the underlying theory through applied device modelling, fabrication concerns and experimental results and analysis. Further, for the devices studied.
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Photonic crystal waveguides (PhCWG) with intentional defects and unavoidable disorder exhibit high quality factor (Q) resonances. Single- and multi-resonance systems based on them are suitable for applications such as optical memories, delay lines and cavity QED.
In this thesis I investigate the potential for light-trapping in thin silicon solar cells by the use of ariousv photonic crystal back-side structures. The rst structure I study consists of a periodic array of cylinders in a con guration with a layer of silicon oxide separating the periodic structure from the rear metal re ector.
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Thesis Spatial collapse dynamics of optical beams in Kerr media Year Name Saikat Ghosh Thesis Quantum and nonlinear optical interactions in photonic crystal fibers Year Name Dimitre Ouzounov Thesis Dispersive and nonlinear propagation of ultrashort pulses in microstructured and hollow-core photonic band-gap fibers Year Name Kevin Moll Thesis.
Joe’s research project is “Large Area Defect Free Colloidal Photonic Crystals using an Under Oil Crystallisation Technique”. Feroze Nazneen, PhD student with the Life Science Interface (LSI) group, won the Biointerphases Best Poster award at the European Society for Biomaterials Conference.
Special thanks go to Paolo Pintus, a PhD student at the Scuola Superiore Sant’Anna in Pisa (Italy) whose master thesis on photonic crystals has been very important for me to start this thesis. I also acknowledge Prof. T. Ak-tosun of the University of Texas at Arlington who helped me studying some topics on Photonic Crystals in a very accurate.
