Metamaterials are artificially designed materials engineered to acquire their properties by their specific structure rather than their composition. They are considered a major scientific breakthrough and have attracted enormous attention over the past decade. The major challenge in obtaining an optical metamaterial active at visible frequencies is the fabrication of complex continuous metallic structures with nano metric features. This thesis presents the fabrication and characterization of optical metamaterials made by block copolymer self assembly. This approach allows fabrication of an intriguing and complex continuous 3D architecture called a gyroid, which is replicated into active plasmonic materials such as gold. The optical properties endowed by this particular gyroid geometry include reduction of plasma frequency, extraordinarily enhanced optical transmission, and a predicted negative refractive index.
Alexandra Ion | CMU
Rodier, Marion Plasmonic spectroscopy of biomacromolecules with chiral metamaterial. PhD thesis, University of Glasgow. This thesis explores the applications of injection-moulded chiral plasmonic nanostructures for biomolecules sensing. Such nanostructures enhance the chiroptical signal generated by chiral objects with plasmonic fields. They are a very efficient tool for the detection of higher order structures tertiary, quaternary in proteins. Subsequently plasmonic metamaterials used for sensing will be introduced. We will demonstrate that the chiral fields they generate, are sensitive to the orientation of the biomolecular material at the surface and the conformation of biomolecular complexes, and that they can sense highly symmetrical structures such as viruses.
How To Structure A PhD Thesis
The Excellence Cluster livMatS welcomes applications for a. The Cluster of Excellence liv MatS develops completely novel, bioinspired materials systems that adapt autonomously to various environments and harvest clean energy from their surroundings. The intention of these purely technical — yet in a behavioral sense quasi-living — materials systems is to meet the demands of humans with regard to pioneering environmental and energy technologies. The societal relevance of autonomous systems and their sustainability will thus play an important role in their development.
In this thesis we study strongly correlated phases of bosons and fermions in lattice models where the lowest Bloch band is flat, i. The states forming the flat band are localized with zero group velocity, facilitating the construction of exact solutions of the many-body problem. Using these solutions and numerical simulations, we characterize the ground state and transport properties of these systems. Weak interactions generally stabilize phases which can be described in terms of non-interacting quasiparticles, and which are qualitatively similar to the phases of free particles. A prime example is the Fermi liquid which is smoothly connected to the free electron gas.