2007年8月
Detailed measurements of nuclear spin polarizations in a single InAlAs quantum dot through overhauser shift of photoluminescence
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
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- 巻
- 20
- 号
- 6
- 開始ページ
- 447
- 終了ページ
- 451
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s10948-007-0240-9
- 出版者・発行元
- SPRINGER
We investigated optical pumping of nuclear spin polarizations in a single self-assembled In0.75Al0.25As/Al0.3Ga0.7As quantum dot. The nuclear spin polarization exhibits the abrupt jump and hysteresis in the excitation power dependence at a particular excitation polarization. Measurement of circular polarization rate of the photoluminescence reveals that the abrupt change of the nuclear spin polarization is created mainly by the spin flip-flop process between nuclei and an electron of a positive charged exciton in this single quantum dot. Model calculation explains well the experimentally observed bistable behavior in InAlAs quantum dot. By using this abrupt change, the sign and magnitude of electron and hole g-factors in z-direction are verified.
- リンク情報
- ID情報
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- DOI : 10.1007/s10948-007-0240-9
- ISSN : 1557-1939
- Web of Science ID : WOS:000249657700011