A summary of the publications arising from the work in my thesis

Papers published from work in my thesis

Magneto-spectroscopy of quantum dots

Briefly, my first paper entitled...

Intraband magneto-spectroscopy of singly and doubly charged n-type self-assembled quantum dots

...looks at the fundamental electron phonon interaction in quantum dots for the case where the dots are populated with one, then two, electrons per dot. The main result is an observation of an increase in the coupling strength of this interaction with increasing electron occupancy from one to two per dot, and that this is in contrast to what is observed in quantum well systems. For a full discussion, please see the dedicated page.

Most, if not all, scientific papers appear in one peer-reviewed journal or another. My first paper took my colleagues and I a significant amount of time (OK, it was mostly me that took the time...) to write, but that effort was worthwhile as the referees were pleased with it and suggested only minor corrections. I'm very proud of both of these quotes which are from the anonymous review process. From the first referee:

The authors report on a detailed magnetopolaron spectroscopy study on an InAs quantum dot multilayer sample. The dots are occupied either with one or with two electrons per dot. The main result of these investigations is the fact that an increased electron-LO phonon coupling is observed when the dot occupancy increases from one to two, in contrast to the situation in two-dimensional systems. The authors explain this phenomenon convincingly and quantitatively.

...and from the second referee:

The authors performed intraband spectroscopy on InAs/GaAs quantum dots, in magnetic fields up to 28T. For these quantum dots, they find a dependence of the electron-phonon coupling on the carrier concentration which is opposite to the case in 2-dimensional systems. The experimental observation is clearly explained with the used Fröhlich Hamiltonian. Furthermore, the polarization dependence of the ground to first-excited state transition as a function of magnetic field is shown. The polarization change from linear to circular polarization is ascribed to the Zeeman splitting which becomes larger than the zero-field excited state splitting energy at high fields. Both observations presented in this paper are interesting. The style of the presentation and the length of the manuscript are very good [...]

Many thanks are due to all the authors on the paper for putting up with my countless revisions and persistence in getting this paper written, but especially to my supervisor Luke Wilson; Marcin Sadowski and Evgeny Zibik for experimental; and David Whittaker for theoretical support. Cheers guys, without your help this would never have been possible...