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.
引用
收藏
页码：787 / 791
页数：5
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