Dynamics of Long-Living Excitons in Tunable Potential Landscapes

Details Dynamics of Long-Living Excitons in Tunable Potential Landscapes Dynamics of Long-Living Excitons in Tunable Potential Landscapes

2005-09-06

arxiv.org/abs/cond-mat/0509142v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures. To appear in Phys. E (MSS-12-Proceedings)

Scientific paper

A novel method to experimentally study the dynamics of long-living excitons in coupled quantum well semiconductor heterostructures is presented. Lithographically defined top gate electrodes imprint in-plane artificial potential landscapes for excitons via the quantum confined Stark effect. Excitons are shuttled laterally in a time-dependent potential landscape defined by an interdigitated gate structure. Long-range drift exceeding a distance of 150 um at an exciton drift velocity > 1000 m/s is observed in a gradient potential formed by a resistive gate stripe.

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