Exciton lifetime in quantum well with vicinal high-density excitons

被引：2

作者：

Hirasawa, M ^{[1
]}

Ishihara, T ^{[1
]}

机构：

[1] Hiroshima Univ, Fac Engn, Dept Phys Elect, Higashihiroshima 7398527, Japan

来源：

PHYSICA E | 2000年 / 7卷 / 3-4期

关键词：

exciton superradiance; exciton-exciton scattering; quantum well; exciton reservoir;

D O I：

10.1016/S1386-9477(99)00392-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Radiative lifetime of an exciton in a GaAs quantum well (QW) is controlled by high-density excitons, which restrict the exciton coherence through scattering. In order to circumvent the phase space filling effect of high-density excitons, we have prepared a QW structure in such a way that a reservoir for high-density excitons is separated from the QW. The lifetime increases (up to 30%) with the exciton density in the reservoir and saturates at 1 x 10(17)/cm(3). The upper bound lifetime is determined by the excitonic relative motion. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：600 / 603

页数：4

共 12 条

[1] WANNIER EXCITON SUPERRADIANCE IN A QUANTUM-WELL MICROCAVITY [J].

BJORK, G ;

PAU, S ;

JACOBSON, J ;

YAMAMOTO, Y .

PHYSICAL REVIEW B, 1994, 50 (23) :17336-17348

[2] OPTICAL-DYNAMICS OF CONDENSED MOLECULAR AGGREGATES - AN ACCUMULATED PHOTON-ECHO AND HOLE-BURNING STUDY OF THE J-AGGREGATE [J].

DEBOER, S ;

VINK, KJ ;

WIERSMA, DA .

CHEMICAL PHYSICS LETTERS, 1987, 137 (02) :99-106

[3] ENHANCED RADIATIVE RECOMBINATION OF FREE-EXCITONS IN GAAS QUANTUM-WELLS [J].

DEVEAUD, B ;

CLEROT, F ;

ROY, N ;

SATZKE, K ;

SERMAGE, B ;

KATZER, DS .

PHYSICAL REVIEW LETTERS, 1991, 67 (17) :2355-2358

[4] DENSITY-DEPENDENT EXCITON RADIATIVE LIFETIMES IN GAAS QUANTUM-WELLS [J].

ECCLESTON, R ;

FEUERBACHER, BF ;

KUHL, J ;

RUHLE, WW ;

PLOOG, K .

PHYSICAL REVIEW B, 1992, 45 (19) :11403-11406

[5] LINEWIDTH DEPENDENCE OF RADIATIVE EXCITON LIFETIMES IN QUANTUM-WELLS [J].

FELDMANN, J ;

PETER, G ;

GOBEL, EO ;

DAWSON, P ;

MOORE, K ;

FOXON, C ;

ELLIOTT, RJ .

PHYSICAL REVIEW LETTERS, 1987, 59 (20) :2337-2340

[6] RAPID RADIATIVE DECAY AND ENHANCED OPTICAL NONLINEARITY OF EXCITONS IN A QUANTUM WELL [J].

HANAMURA, E .

PHYSICAL REVIEW B, 1988, 38 (02) :1228-1234

[7] VERY LARGE OPTICAL NONLINEARITY OF SEMICONDUCTOR MICROCRYSTALLITES [J].

HANAMURA, E .

PHYSICAL REVIEW B, 1988, 37 (03) :1273-1279

[8]

HIRASAWA M, 1999, P INT C LUM OPT SPEC

[9] SIZE-DEPENDENT RADIATIVE DECAY TIME OF CONFINED EXCITONS IN CUCL MICROCRYSTALS [J].

ITOH, T ;

FURUMIYA, M ;

IKEHARA, T ;

GOURDON, C .

SOLID STATE COMMUNICATIONS, 1990, 73 (04) :271-274

[10]

SAKAI H, 1991, P 38 SCOTT U SUMM SC

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