Coherence and dephasing in self-assembled quantum dots: (invited)

Jørn Märcher Hvam, K. Leosson, Dan Birkedal

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We measured dephasing times in InGaAl/As self-assembled quantum dots at low temperature using degenerate four-wave mixing. At 0K, the coherence time of the quantum dots is lifetime limited, whereas at finite temperatures pure dephasing by exciton-phonon interactions governs the quantum dot coherence. The inferred homogeneous line widths are significantly smaller than the line widths usually observed in the photoluminescence from single quantum dots indicating an additional inhomogeneours broadening mechanism in the latter.
Original languageEnglish
Title of host publicationThird IEEE Conference on Nanotechnology, 2003. IEEE-NANO 2003.
Publication date2003
ISBN (Print)07-80-37976-4
Publication statusPublished - 2003
Event3rd IEEE Conference on Nanotechnology - San Francisco, CA, United States
Duration: 12 Aug 200314 Aug 2003
Conference number: 3


Conference3rd IEEE Conference on Nanotechnology
Country/TerritoryUnited States
CitySan Francisco, CA

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