1 Nanophotonics Theory and Signal Processing, Department of Photonics Engineering, Technical University of Denmark2 Department of Photonics Engineering, Technical University of Denmark3 Quantum Photonics, Department of Photonics Engineering, Technical University of Denmark4 Department of Physics, Technical University of Denmark5 Risø National Laboratory for Sustainable Energy, Technical University of Denmark
The thesis describes the theoretical study of optical plasmons mediated light-matter interaction. We develop a finite element method to study spontaneous emission from emitters coupled to plasmonic waveguides. The numerical method is applied to calculate the coupling of a emitter coupled to a cylindrical nanowire, a square metallic nanowire and a metallic slot waveguide with inhomogenous dielectric environment. We also examine a quantum emitter coupled to optical nanoantennas. We mimic the conventional Yagi-Uda to realize its optical analogy for directional emission. We also propose a plasmon-based reconfigurable antenna to controllably distribute emission from a single emitter in spatially separated channels.