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Fine structure of exciton complexes in high-symmetry quantum dots: Effects of symmetry breaking and symmetry elevation
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-4547-6673
Ecole Polytech Fed Lausanne.
Ecole Polytech Fed Lausanne.
Ecole Polytech Fed Lausanne.
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2010 (English)In: PHYSICAL REVIEW B, ISSN 1098-0121, Vol. 81, no 16, 161307- p.Article in journal (Refereed) Published
Abstract [en]

Quantum dots (QDs) of high symmetry (e.g., C-3 nu) have degenerate bright exciton states, unlike QDs of C-2 nu symmetry, making them intrinsically suitable for the generation of entangled photon pairs. Deviations from C-3 nu symmetry are detected in real QDs by polarization-resolved photoluminescence spectroscopy in side-view geometry of InGaAs/AlGaAs dots formed in tetrahedral pyramids. The theoretical analysis reveals both an additional symmetry plane and weak symmetry breaking, as well as the interplay with electron-hole and hole-hole exchange interactions manifested by the excitonic fine structure.

Place, publisher, year, edition, pages
American Physical Society , 2010. Vol. 81, no 16, 161307- p.
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-56448DOI: 10.1103/PhysRevB.81.161307ISI: 000277217200014OAI: oai:DiVA.org:liu-56448DiVA: diva2:319264
Note
Original Publication: Fredrik Karlsson, M A Dupertuis, D Y Oberli, E Pelucchi, A Rudra, Per-Olof Holtz and E Kapon, Fine structure of exciton complexes in high-symmetry quantum dots: Effects of symmetry breaking and symmetry elevation, 2010, PHYSICAL REVIEW B, (81), 16, 161307. http://dx.doi.org/10.1103/PhysRevB.81.161307 Copyright: American Physical Society http://www.aps.org/ Available from: 2010-05-17 Created: 2010-05-17 Last updated: 2015-01-23

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