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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收藏

页码：787 / 791

页数：5

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