Excitonic Phenomena

We explore the transport and confinement of long-living spatially indirect dipolar excitons, electric-field-induced via the quantum-confined Stark effect in a double quantum well, aiming for a better understanding of many-body phenomena in dipolar excitonic ensembles, in which the attractive forces between electrons in one quantum well and holes in the adjacent one cause excitonic binding and are complemented by in-plane repulsive forces of the thus formed dipoles. Depending on confinement, excitonic densities, and temperature, these interactions are expected to possibly result in phase transitions ranging from Wigner crystallization of such dipolar excitons via Bose-Einstein condensation in fully confined systems to a Mott transition into an electron-hole plasma at highest densities.

Recent Highlights 

Tunable emission from excitonic traps and antitraps

Dynamics of indirect excitons in low-dimensional potential landscapes

Collaborations

Jorg P. Kotthaus (LMU München), Katarzyna Kowalik-Seidl (LMU München), Georg Schinner (LMU München), Dieter Schuh (Regensburg, Germany), Werner Wegscheider (Zürich, Switzerland), Alexander Govorov (Ohio, USA)

Recent Publications

A list of recent publications can be found here.

Funding

Funding by the following institutions is gratefully acknowledged: 

       DFG project KO-416/17