Collection of indirect excitons in a diamond-shaped electrostatic trap

Details Collection of indirect excitons in a diamond-shaped electrostatic trap Collection of indirect excitons in a diamond-shaped electrostatic trap

2009-06-03

arxiv.org/abs/0906.0639v1

Phys. Rev. Lett. 103, 087403 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 Pages, 5 figures

Scientific paper

10.1103/PhysRevLett.103.087403

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.

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