Analysing Anisotropic Photo-Physical Effects in Strongly Coupled Metal Hybrid Structures

This thesis examined hybrid states emerging by the strong light-matter interaction between a propagating surface plasmon polartiton inherent to a metallic thin films and an organic layer providing localised Frenkel excitons or localised surface plasmon polaritons, occurring in nano-sized metallic structures. Additionally the latter were organized in a hexagonal honeycomb lattice. Applying a modified Jaynes-Cumming model to the newly arising hybrid states allows us to evaluate characteristic physical parameters like the coupling strength \(V\) or the energy \(E\) of the new state constituted by the two coupling partners. By the angular dependence of the related dispersion, we can correlate the relative orientation of the electronic field of the plasmon \(\vec{E}\) to the transition dipole moment \(\vec{\mu}\) resulting in a vectorial dependency \(V\approx \vec{E}\cdot \vec{\mu }=|\vec{E}| |\vec{\mu}| cos(\varphi )\) and thereby, draw conclusions on the molecular orientation and photo-physical properties. In order to properly measure and analyse these plexcitonic dispersions, a modified Kretschmann set-up was developed and build from scratch within the scope of this work.