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A Microscopic Lattice for Two-dimensional Dipolar Excitons

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arxiv 2009.07562 v2 pith:666WYEDO submitted 2020-09-16 cond-mat.mes-hall

A Microscopic Lattice for Two-dimensional Dipolar Excitons

Camille Lagoin , Stephan Suffit , Mathieu Bernard , Maxime Vabre , Kenneth West , Kirk Baldwin , Loren Pfeiffer , Francois Dubin This is my paper
classification cond-mat.mes-hall
keywords dipolarexcitonslatticepotentialtwo-dimensionalartificialcompetesconfined
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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.

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