We report a two-dimensional artificial lattice for dipolar excitons confined in a GaAs double quantum well. Exploring the regime of large fillings per lattice site, we verify that the lattice depth competes with the magnitude of excitons repulsive dipolar interactions to control the degree of localisation in the lattice potential. Moreover, we show that dipolar excitons radiate a narrow-band photoluminescence, with a spectral width of a few hundreds of micro-eV at 340 mK, in both localised and delocalised regimes. This makes our device suitable for explorations of dipolar excitons quasi-condensation in a periodic potential.
@article{arxiv.2009.07562,
title = {A Microscopic Lattice for Two-dimensional Dipolar Excitons},
author = {Camille Lagoin and Stephan Suffit and Mathieu Bernard and Maxime Vabre and Kenneth West and Kirk Baldwin and Loren Pfeiffer and Francois Dubin},
journal= {arXiv preprint arXiv:2009.07562},
year = {2021}
}