Purcell effect and photoluminescence emission enhancement of individual CdSe/CdS/PMMA nano particles coupled to metallic bullseye resonators

Summary form only given. Polymer-capped colloidal semiconductor quantum dots [1] offer a robust material system for time-resolved analysis and individual control of ultrafast charge carrier dynamics [2]. This goal necessitates a strong enhancement of light-matter interaction. In this work we demonstrate an efficient coupling of individual CdSe/CdS/PMMA quantum dots (QDs) to plasmonic resonators formed out of multiple concentric rings patterned in a 280-nm thick gold layer. Such a “bullseye” design allows for efficient manipulation of single QDs into the center of the antenna while imposing no polarization selectivity [3]. As a result, we achieve a dramatic increase of the photoluminescence (PL) emission intensity and the radiative decay rates due to the Purcell effect.