Single photon emission with high degree of circular polarization from a single quantum dot under zero magnetic field

Kumano, H.; Kobayashi, H.; Hayashi, Y.; Jo, M.; Suemune, I.; Sasakura, H.; Adachi, S.; Muto, S.

Single photon emission with high degree of circular polarization from a single quantum dot under zero magnetic field

Kumano, H.; Kobayashi, H.; Hayashi, Y. et al.

Physica. E, Low-dimensional Systems and Nanostructures, 2008, 40(6), 1824-1827

Permalink : https://hdl.handle.net/2115/34639

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アクセス権	open access
URI	https://hdl.handle.net/2115/34639
タイトル	Single photon emission with high degree of circular polarization from a single quantum dot under zero magnetic field
著者	Kumano, H. ; Kobayashi, H. ; Hayashi, Y. ; Jo, M. ; Suemune, I. ; Sasakura, H. ; Adachi, S. ; Muto, S.
著者名 Kumano, H.
著者名 Kobayashi, H.
著者名 Hayashi, Y.
著者名 Jo, M.
e-Rad_Researcher 00112178 著者名 Suemune, I.
著者名 Sasakura, H.
e-Rad_Researcher 10221722 著者名 Adachi, S.
e-Rad_Researcher 00114900 著者名 Muto, S.
言語	英語
キーワード	polarization conversion
	Single quantum dot
	single photon
	charged exciton
	spin flip
	PACS=71.35.-y
	PACS=72.25.Fe
	PACS=72.25.Rb
	PACS=78.67.Hc
発行日	2008-04
出版者	Elsevier
収録物名	Physica. E, Low-dimensional Systems and Nanostructures
巻(号)	40(6)
ページ	1824-1827
抄録	Single photon emission with high degree of circular polarization (DCP) from a positively charged exciton (trion) state in a single quantum dot (QD) is demonstrated under zero magnetic field. Obtained high DCP as large as 0.6 is a clear manifestation of highly effective mutual polarization conversion between single photon and single electron spin. This finding also reveals that the spin relaxation is strongly suppressed during capture and thermalization processes and also in trion ground states in a quantum dot. Moreover, exciton charging state control is shown to be possible by modifying the electron capture probability through the excitation energy tuning, which leads to an exclusive formation of the positive trion in a QD.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	1386-9477
NCID	AA1119366X
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.physe.2007.10.041