Longitudinal and transverse exciton-spin relaxation in a single InAsP quantum dot embedded inside a standing InP nanowire using photoluminescence spectroscopy

Sasakura, H.; Hermannstädter, C.; Dorenbos, S. N.; Akopian, N.; van Kouwen, M. P.; Motohisa, J.; Kobayashi, Y.; Kumano, H.; Kondo, K.; Tomioka, K.; Fukui, T.; Suemune, I.; Zwiller, V.

Longitudinal and transverse exciton-spin relaxation in a single InAsP quantum dot embedded inside a standing InP nanowire using photoluminescence spectroscopy

Sasakura, H.; Hermannstädter, C.; Dorenbos, S. N. et al.

Physical Review B, 2012, 85(7), 075324

Permalink : https://hdl.handle.net/2115/48661

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アクセス権	open access
URI	https://hdl.handle.net/2115/48661
タイトル	Longitudinal and transverse exciton-spin relaxation in a single InAsP quantum dot embedded inside a standing InP nanowire using photoluminescence spectroscopy
著者	Sasakura, H. ; Hermannstädter, C. ; Dorenbos, S. N. ; Akopian, N. ; van Kouwen, M. P. ; Motohisa, J. ; Kobayashi, Y. ; Kumano, H. ; Kondo, K. ; Tomioka, K. ; Fukui, T. ; Suemune, I. ; Zwiller, V.
e-Rad_Researcher 90374595 著者名 Sasakura, H.
著者名 Hermannstädter, C.
著者名 Dorenbos, S. N.
著者名 Akopian, N.
著者名 van Kouwen, M. P.
著者名 Motohisa, J.
著者名 Kobayashi, Y.
著者名 Kumano, H.
著者名 Kondo, K.
著者名 Tomioka, K.
著者名 Fukui, T.
著者名 Suemune, I.
著者名 Zwiller, V.
言語	英語
発行日	2012-02-15
出版者	American Physical Society
収録物名	Physical Review B
巻(号)	85(7)
ページ	075324
抄録	We have investigated the optical properties of a single InAsP quantum dot embedded in a standing InP nanowire. Elongation of the transverse exciton-spin relaxation time of the exciton state with decreasing excitation power was observed by first-order photon correlation measurements. This behavior is well explained by the motional narrowing mechanism induced by Gaussian fluctuations of environmental charges in the nanowire. The longitudinal exciton-spin relaxation time is evaluated by the degree of the random polarization of emission originating from exciton states confined in a single-nanowire quantum dot by using Mueller calculus based on Stokes parameters representation. The reduction in the random polarization component with decreasing excitation power is caused by suppression of the exchange interaction of electron and hole due to an optically induced internal electric field by the dipoles at the wurtzite and zinc-blende heterointerfaces in the InP nanowire.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2012 American Physical Society
PISSN	1098-0121
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.85.075324