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Excitonic spin-state preservation mediated by optical-phonon resonant excitation in a single quantum dot

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Title: Excitonic spin-state preservation mediated by optical-phonon resonant excitation in a single quantum dot
Authors: Kumano, H. Browse this author
Kobayashi, H. Browse this author
Ekuni, S. Browse this author
Hayashi, Y. Browse this author
Jo, M. Browse this author
Sasakura, H. Browse this author
Adachi, S. Browse this author →KAKEN DB
Muto, S. Browse this author →KAKEN DB
Suemune, I. Browse this author →KAKEN DB
Keywords: PACS=78.67.Hc
PACS=71.35.-y
PACS=72.25.Fe
PACS=72.25.Rb
Issue Date: 25-Aug-2008
Publisher: American Physical Society
Journal Title: Physical Review. B, Condensed Matter and Materials Physics
Volume: 78
Issue: 8
Start Page: 081306
Publisher DOI: 10.1103/PhysRevB.78.081306
Abstract: High degree of excitonic spin-state preservation during energy relaxation is demonstrated in a single quantum dot. Optical-phonon resonances and corresponding suppression of spin relaxation are clearly identified as dip structures in photoluminescence excitation spectra probed by the positive trion emission. Consequently, under the longitudinal optical-phonon resonant excitation, a distinguishably high degree of circular polarization up to ~0.85 is achieved. Extended spin-relaxation time in the positive trion ground state compared to that in neutral exciton ground state is also revealed.
Rights: © 2008 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/34638
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 熊野 英和

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