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Long-Distance Diffusion of Excitons in Double Quantum Well Structures

Long-Distance Diffusion of Excitons in Double Quantum Well Structures

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 30 micros and diffuse up to 500 microm. Particular attention is given to establishing that the transport occurs by …