Imagine a world in which excitons throw wild parties on a two-dimensional dance floor and we are the gatekeepers with stun guns - this is the world of probably the most exclusive quantum nightclub!
My project is about the manipulation of excitons using electric fields. We use the material class of transition metal dichalcogenides (TMDs), which have different excitonic quantum states. Thin layers of TMDs are stamped onto prefabricated gold contacts so that additional charge carriers can be introduced into the TMDs, e.g. like in a MOSFET. This doping has a measurable effect on the light-induced excitons. Heterostructures with a type II band junction are of particular interest to me, as these systems can accommodate so-called interlayer excitons. These exhibit a longer lifetime and a permanent dipole moment. If external electric fields are applied to these systems, we can study the interaction of the excitons with this field. For this purpose, we use spatially resolved and gate voltage-dependent photoluminescence (PL). We also study the diffusion of excitons with imaging PL under the influence of electric fields.
If you have any questions or are interested in this project, please contact me at the e-mail or phone number below.