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 7 of 7 for “"topological photonics"”.
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Novel Approaches to Discovery and Optimization in Physics: Symbolic Regression, Bayesian Optimization, and Topological Photonics
… optimization and automated discovery of 3D topological photonic crystals using a combination of a low-dimensional level-set parameterization and standard gradient-free optimization algorithms. My approach is able to discover novel 3D photonic crystals in several topology settings requiring …
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Non-Hermitian topological states in photonic systems
In this thesis I explore non-Hermitian topological photonics with the aim of describing new phenomena which question our understanding of how far the current classification of topological states extends. This work invigorates the search for topological states in photonic systems with the hope of …
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Topological photonic metasurfaces for light manipulation and strong light-matter interaction
… one of the most promising platforms in which topological phases can be explored and exploited.</p> <p>Topological photonic structures attract a significant interest owing to their outstanding properties such as a resilience to defects and disorders. Topological insulators with engineered …
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Design and experimental observation of topological states in photonic metasurfaces
<p>Topological phases in photonics attract a lot of attention due to their unique properties which allow controlling optical coupling and electromagnetic field distributions in nanostructures. Diverse phenomena supported by photonic topological structures include robust scatter-free waveguiding, an …
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Electric multipole moments and higher-order topological phases in crystalline insulators and superconductors
… charge is at the basis of our understanding of topological band theory. We show, by using the Berry phase formulation and generalizations of it, as well as by exact diagonalization of tight-binding models, that crystalline insulators can generate charge and polarization patterns compatible with …
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Nonlinear dissipative dynamics of optomechanical and laser arrays
… arrays and (ii) laser arrays with a topologically nontrivial structure. The chosen models are relevant to state-of-the-art optomechanical experiments as well as to recent implementations of topological lasers based on semiconductor ring-resonator arrays. We present our results with a …
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Non-Hermitian Topology and Directional Amplification in Driven-Dissipative Cavity Arrays
… a one-to-one correspondence between a non-zero topological invariant defined on the spectrum of the dynamic matrix and regimes of directional amplification, in which the end-to-end gain grows exponentially with the number of cavities. Furthermore, we show that non-Hermitian topological …