Date of Award

2018

Document Type

Open Access Dissertation

Department

Physics and Astronomy

Sub-Department

College of Arts and Sciences

First Advisor

Yanwen Wu

Abstract

Next generation integrated nanophotonic devices must fabricate large numbers of nanoscaled light coupling structures onto a single wafer: emitters such as quantum dots, resonators such as nanocavities and plasmonic nanoparticles, photonic crystal and nano-plasmonic waveguides, among others. Before precision planning and engi- neering will be possible a thorough understanding of the interaction between these structures must be documented. We present in this work an investigation of the interaction between quantum dots and plasmonic structures in the weak coupling regime. We found that surface plasmon supporting silver structures placed about 100nm from InGaAs quantum dots enabled an all optical polarization dependent switching mechanism between different exciton charge states when exciting above the band gap energy of the encapsulating GaAs. Furthermore, when exciting below the band gap of GaAs, we found a reduction in the photoluminescence intensity due to the launching of surface plasmon polaritons (SPPs) on the silver surfaces.

Included in

Physics Commons

Share

COinS