Transition from superradiant free-polarization decay to subradiant photon-echo

被引：6
|
作者：
Hubner, M
Kuhl, J [1 ]
Grote, B
Stroucken, T
Koch, SW
Hey, R
Ploog, K
机构：
[1] Max Planck Inst Festkorperforsch, Stuttgart, Germany
[2] Univ Marburg, Dept Phys, D-35032 Marburg, Germany
[3] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany
[4] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
来源：
SOLID STATE COMMUNICATIONS | 1998年 / 108卷 / 10期
关键词：
D O I：
10.1016/S0038-1098(98)00339-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Time-resolved degenerate four-wave mixing experiments on a multiple-quantum-well Bragg structure reveal a complex real-time pattern of the nonlinear optical response from the superradiant and the subradiant coupled exciton-photon modes. We find a free-polarization decay for the superradiant mode and a photon-echo from the subradiant modes. Rotation of the Bragg structure with respect to the incident laser beams implying a reduction of the effective quantum well separation results in a distinct change of the temporal behaviour. We estimate a value of less than 40 mu eV for the nonradiative contribution to the homogeneous linewidth of free excitons in our GaAs samples. (C) 1998 Elsevier Science Ltd. All rights reserved.
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页码：787 / 791
页数：5
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