Coupling N single-photon emitters to a single cavity mode

Group: Lumilab

Promotors : Prof. Dr. ir. Edouard Brainis ,  Prof. Dirk Poelman , Prof. Nicolas Cerf (VUB).


This master thesis will consist in modelling the interaction of several atom-like quantum systems with a single mode of an optical resonator. Assuming that once excited each atom can emit a single photon into the cavity mode, we are interested in understanding what quantum states of light can be generated inside the cavity if the excitation of the atoms can be controlled by external means. The work is related to an experimental project running at the Ghent University and consisting in controlling the emission of a several quantum dots (nanometric semiconductor crystals) coupled to the same microdisk resonator. In addition to correctly modelling the problem and classifying the possible interaction regimes, it will be important to focus on the regime that can actually be achieved experimentally and discuss it in depth. The problem depends on many parameters such as the cavity losses, the radiation lifetime and coherence time of the emitters, and even their location in the cavity. Therefore, the student is expected to develop a step-by-step approach, starting from a toy-model, then improving it by adding more and more parameters and understanding their effect.  
This research topics is ideal for who want to understand the interaction of matter with light at its most fundamental level (quantum optics). It requires a good understanding of quantum mechanics, mathematical skills  and the ability to translate experimental constrains into model parameters.