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Integration of site-controlled pyramidal quantum dots and photonic crystal membrane cavities
Ecole Polytechnique Fédérale de Lausanne .
Ecole Polytechnique Fédérale de Lausanne .
Ecole Polytechnique Fédérale de Lausanne .
Ecole Polytechnique Fédérale de Lausanne .
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2008 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 92, 263101- p.Article in journal (Refereed) Published
Abstract [en]

The authors demonstrate the deterministic coupling between a single, site-controlled InGaAs/GaAs pyramidal quantum dot (QD) and a photonic crystal membrane cavity defect. The growth of self-ordered pyramidal QDs in small (300 nm base side) tetrahedral recesses etched on (111)B GaAs substrates was developed in order to allow their integration within the thin GaAs membranes. Accurate (better than 50 nm) positioning of the QD with respect to the optical cavity mode is achieved reproducibly owing to the site control. Coupling of the dot emission with the cavity mode is evidenced in photoluminescence measurements. The deterministic positioning of the pyramidal QDs and the control of their emission spectrum opens the way for devices based on QDs integrated with coupled nanocavities.

Place, publisher, year, edition, pages
2008. Vol. 92, 263101- p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-44050DOI: 10.1063/1.2952278Local ID: 75485OAI: oai:DiVA.org:liu-44050DiVA: diva2:264911
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13

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Karlsson, Fredrik

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