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Interdot spin transfer dynamics in laterally coupled excited spin ensemble of high-density InGaAs quantum dots
| Title: | Interdot spin transfer dynamics in laterally coupled excited spin ensemble of high-density InGaAs quantum dots |
| Authors: | Hiura, Satoshi Browse this author | | Takeishi, Kazuki Browse this author | | Urabe, Masayuki Browse this author | | Itabashi, Kodai Browse this author | | Takayama, Junichi Browse this author | | Kiba, Takayuki Browse this author →KAKEN DB | | Sueoka, Kazuhisa Browse this author →KAKEN DB | | Murayama, Akihiro Browse this author →KAKEN DB |
| Issue Date: | 9-Jul-2018 |
| Publisher: | American Institute of Physics (AIP) |
| Journal Title: | Applied physics letters |
| Volume: | 113 |
| Issue: | 2 |
| Start Page: | 023104 |
| Publisher DOI: | 10.1063/1.5022641 |
| Abstract: | Interdot spin transfer dynamics is studied in a laterally coupled excited spin ensemble of high-density InGaAs quantum dots (QDs). We observe a rise time of the photoluminescence intensity of similar to 100 ps and a simultaneous increase in the spin polarization of the excited spin ensemble, indicating spin injection from higher-energy levels in smaller QDs. Moreover, this coupled ensemble exhibits decay properties of the spin polarization that vary with the excited spin density. This phenomenon can be quantitatively understood by considering interdot spin transfer into lower-energy levels of the surrounding QDs, where the transfer rate depends on the degree of state filling of each QD level. Published by AIP Publishing. |
| Rights: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in Appl. Phys. Lett. 113(2), 023104 (2018) and may be found at https://doi.org/10.1063/1.5022641. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74910 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 樋浦 諭志
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