Collection of indirect excitons in a diamond-shaped electrostatic trap

Abstract

We report on the principle and realization of a new trap for excitons -- the diamond electrostatic trap -- which uses a single electrode to create a confining potential for excitons. We also create elevated diamond traps which permit evaporative cooling of the exciton gas. We observe collection of excitons towards the trap center with increasing exciton density. This effect is due to screening of disorder in the trap by the excitons. As a result, the diamond trap behaves as a smooth parabolic potential which realizes a cold and dense exciton gas at the trap center.

4 Pages, 5 figures

References in corpus (3)

• Drift mobility of long-living excitons in coupled GaAs quantum wells
• Trapping of Cold Excitons with Laser Light
• Localization-Delocalization Transition of Indirect Excitons in Lateral Electrostatic Lattices

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• A Microscopic Lattice for Two-dimensional Dipolar Excitons
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• Ground and excited states of coupled exciton liquids in electron-hole quadrilayers