Two-dimensional exciton magnetic polaron dynamics in thin CdTe/(Cd,Mn)Te quantum wells

Kirill V. Kavokin; Alexey V. Kavokin; Igor N. Uraltsev; Dmitrii R. Yakovlev; Gottfried Landwehr; A. Pohlmann

doi:10.1117/12.137629

3 September 1992 Two-dimensional exciton magnetic polaron dynamics in thin CdTe/(Cd,Mn)Te quantum wells

Kirill V. Kavokin, Alexey V. Kavokin, Igor N. Uraltsev, Dmitrii R. Yakovlev, Gottfried Landwehr, A. Pohlmann

Proceedings Volume 1675, Quantum Well and Superlattice Physics IV; (1992) https://doi.org/10.1117/12.137629
Event: Semiconductors '92, 1992, Somerset, NJ, United States

Abstract

Dynamics of the two-dimensional exciton magnetic polaron (EMP) formation in thin CdTe/Cd_0.79Mn_0.21Te quantum wells is analyzed on the base of solving the non- stationary Schroedinger equation with the time dependent exchange potential and measured by time-resolved spectroscopy. The magnetic polaron formation time is found to enhance dramatically with an increase of the QW width, L_z, to exceed the exciton life-time at L_z > 10 angstroms and to suppress the observed polaron energy shift at L_z > 25 angstroms. Analyzing the effect of the initial exciton localization due to L_z fluctuations on the magnetic polaron formation we conclude that EMP can be considered as quasi-free. The EMP formation is shown to be governed by the in-plane exciton magnetic autolocalization.

Citation Download Citation

Kirill V. Kavokin, Alexey V. Kavokin, Igor N. Uraltsev, Dmitrii R. Yakovlev, Gottfried Landwehr, and A. Pohlmann "Two-dimensional exciton magnetic polaron dynamics in thin CdTe/(Cd,Mn)Te quantum wells", Proc. SPIE 1675, Quantum Well and Superlattice Physics IV, (3 September 1992); https://doi.org/10.1117/12.137629

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