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Title: Probing the response of quantum plasmonic systems : from the macroscopic to the microscopic
Author: McEnery, Kyle
ISNI:       0000 0004 5349 2918
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2014
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In this thesis we investigate the response of plasmonic systems in a quantum optics setting. This work can be grouped into two sub-investigations, the study of macroscopic and microscopic responses. The narrative of the thesis comprises three principal parts. First, we give an in-depth review of the field of quantum plasmonics as it is an important theme that runs through the work contained in this thesis. In particular, we focus on outlining the cutting edge research that is being done on the intense interactions between plasmonic systems and quantum emitters. This leads naturally to the first investigation into the macroscopic response of quantum plasmonic systems in a metamaterial setting. We outline how complex hybrid systems of plasmonic metal nanoparticles (MNP) and two-level quantum dots (QD) can be used to create a quantum plasmonic metamaterial. Metamaterials are structures composed of periodic lattices of identical subwavelength unit cell scatterers, each of which governs completely the electromagnetic properties of the entire bulk material. We theorize the use of MNP-QD nanorings as a unit cell in order to control the macroscopic magnetic properties of the metamaterial. We outline how such a metamaterial can have a tunable, and saturable, magnetic permeability. In the last part of the thesis we consider the model of a single light mode interacting ultrastrongly with a collection of emitters, in the anticipation that quantum plasmonic systems can be brought into this ultrastrong-coupling regime (USC). In particular we study the emission of the system after the coupling between the light mode and the emitters is non-adiabatically switched-on. We find evidence that for both two-level, and multi-level, emitters in the USC, both the counter-rotating terms and the diamagnetic term must be included to prevent qualitative errors.
Supervisor: Kim, Myungshik; Maier, Stefan Sponsor: Leverhulme Foundation
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available