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

Jørn Märcher Hvam, K. Leosson, Dan Birkedal

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Abstract

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.
Volume1
PublisherIEEE
Publication date2003
Pages122-125
ISBN (Print)07-80-37976-4
DOIs
Publication statusPublished - 2003
Event3rd IEEE Conference on Nanotechnology - San Francisco, CA, United States
Duration: 12 Aug 200314 Aug 2003
Conference number: 3

Conference

Conference3rd IEEE Conference on Nanotechnology
Number3
CountryUnited States
CitySan Francisco, CA
Period12/08/200314/08/2003

Bibliographical note

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Cite this

Hvam, J. M., Leosson, K., & Birkedal, D. (2003). Coherence and dephasing in self-assembled quantum dots: (invited). In Third IEEE Conference on Nanotechnology, 2003. IEEE-NANO 2003. (Vol. 1, pp. 122-125). IEEE. https://doi.org/10.1109/NANO.2003.1231730