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Excitonic spin-state preservation mediated by optical-phonon resonant excitation in a single quantum dot
| 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)
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Submitter: 熊野 英和
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