My research is focused on optical investigations of direct band gap semiconducting monolayer transition metal dichalcogenides (TMDs), specifically molybdenum and tungsten diselenides. In particular I work on 2-dimensional polaritonics by incorporating these atomically thin materials into open-access tuneable microcavities. Accessing the strong coupling regime in this way allows significant insight into the valley dynamics of exciton-polaritons in monolayer TMDs, and as such can be used to probe exciton valley polarisation and coherence effects. In addition to using microcavities, I study these novel materials by magneto-optical spectroscopy, to investigate magnetic field dependent behaviour of exciton fine structure and valley polarisation.
Besides optical spectroscopy, I work on fabrication of 2-dimensional material samples for my research. This involves mechanical exfoliation and use of various crystal transfer techniques in order to produce samples ranging from single isolated monolayers on a variety of substrates, to van der Waals heterostructures combining TMDs, hexagonal boron nitride and graphene.
Department of Physics and Astronomy
University of Sheffield
+44 (0) 114 22 24569