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Voltage-controlled trapping of excitons and “storage of light” in lateral superlattices

Zimmermann, S. ; Govorov, A. O. ; Wixforth, A. ; Rocke, C. ; Hansen, W. ; Kotthaus, J.P. ; Bichler, Max ; Wegscheider, Werner
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Date of publication of this fulltext: 09 Nov 2009 13:07


Abstract

Voltage-controlled lateral superlattices of various periods are employed to demonstrate the trapping of photogenerated excitons in quasi-one-dimensional regions and to store light in form of ionised excitons in the quantum well of a semiconductor heterostructure. The superlattices are induced by applying spatially alternating external voltages via interdigitated metal gates. Exciton localisation ...

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