Extremely long electron spin coherence induced by a trion transition in ZnSe/BeTe type-II quantum wells

The spin coherence of photoexcited electrons in non‐doped ZnSe/BeTe type‐II quantum wells was investigated by a time‐resolved Kerr rotation (TRKR) technique using resonant excitation of either excitons or negatively charged excitons (trions) in magnetic fields at 1.4 K. The TRKR signal arising from...

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Veröffentlicht in:	Physica status solidi. C 2009-01, Vol.6 (1), p.272-275
Hauptverfasser:	Mino, H., Kouno, Y., Oto, K., Muro, K., Akimoto, R., Takeyama, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	71.35.Pq 72.25.Fe 72.25.Rb 78.20.Jq 78.47.Fg 78.67.De
Online-Zugang:	Volltext
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Zusammenfassung:	The spin coherence of photoexcited electrons in non‐doped ZnSe/BeTe type‐II quantum wells was investigated by a time‐resolved Kerr rotation (TRKR) technique using resonant excitation of either excitons or negatively charged excitons (trions) in magnetic fields at 1.4 K. The TRKR signal arising from the Lamor precession of photo‐excited electron spins in ZnSe layers was observed and enhanced at the trion resonance, where the spin relaxation time reached up to several nanoseconds. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:	1862-6351 1610-1634 1610-1642
DOI:	10.1002/pssc.200879870