Abstract
ABSTRACT Active control of plasmon propagation via coupling to Quantum Dots (QDs) is a hot topic in nano-photonic research. When a QD is excited it acts like a dipole emitter. If this excited QD is placed near a metallic waveguide structure, it can decay either radiatively into bulk electromagnetic radiation, non-radiatively into heating of the metal or, of interest to this project, into a plasmon mode ( pl ). By altering the position of the QD it is possible to optimise the decay into the plasmon mode. In this paper we present a system with a QD placed within the vicinity of a single mode Gap Plasmon Waveguide (GPW). First, we construc ted a 2D finite element modelling simulation to find pl using COMSOL MULTIPHYSICS for symmetric GPW structures with varying width (w) of the ga p and distance of the QD to the waveguide surface (d). We then constructed a 3D model to calculate total rate of spontaneous emission of a QD ( tot ) and determine spontaneous emission factor, which is the ratio between
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