Long-distance diffusion of excitons in double quantum well structures

Z. Vörös, R. Balili, D. W. Snoke, L. Pfeiffer, K. West

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Abstract

In this Letter we report on lateral diffusion measurements of excitons at low temperature in double quantum wells of various widths. The structure is designed so that excitons live up to 30μs and diffuse up to 500μm. Particular attention is given to establishing that the transport occurs by exciton motion. The deduced exciton diffusion coefficients have a very strong well width dependence, and obey the same power law as the diffusion coefficient for electrons.

Original languageEnglish (US)
Article number226401
JournalPhysical review letters
Volume94
Issue number22
DOIs
StatePublished - Jun 10 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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