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Nuclear and excitonic spin polarization formed using cross-linearly polarized pulse pair via half-localized state in a single self-assembled quantum dot

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Title: Nuclear and excitonic spin polarization formed using cross-linearly polarized pulse pair via half-localized state in a single self-assembled quantum dot
Authors: Sasakura, H. Browse this author
Adachi, S. Browse this author
Muto, S. Browse this author
Hirose, S. Browse this author
Song, H. Z. Browse this author
Takatsu, M. Browse this author
Issue Date: 2008
Publisher: American Institute of Physics
Journal Title: Journal of Applied Physics
Volume: 103
Issue: 10
Start Page: 103530-1
End Page: 103530-5
Publisher DOI: 10.1063/1.2927448
Abstract: The oscillations of excitonic and nuclear spin polarizations in an optically pumped single self-assembled In0.8Al0.2As/Al0.35Ga0.65As quantum dot QD were clearly observed under the excitation of a wetting layer edge at B=5 T. This indicates that an exciton pair with opposite spins is alternatively created via the half-localized state only by changing the delay time between cross-linearly polarized pulse pair. Furthermore, periodic modulation of Zeeman energy synchronizes the degree of circular polarization of photoluminescence from a single QD, indicating that the Overhauser field follows the optically created electron spin polarization in half-localized states of a QD, and the half-localized state in a QD consists of a confined electron in a discrete state and hole in the continuum state.
Type: article
URI: http://hdl.handle.net/2115/49866
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: 笹倉 弘理

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