COUPLING OF EXCITON-TRANSITIONS ASSOCIATED WITH DIFFERENT QUANTUM-WELL ISLANDS

被引：44

作者：

KOCH, M

FELDMANN, J

GOBEL, EO

THOMAS, P

SHAH, J

KOHLER, K

机构：

[1] FRAUNHOFER INST APPL SOLID STATE PHYS,D-79108 FREIBURG,GERMANY

[2] PHILIPPS UNIV,ZENTRUM MAT WISSENSCH,D-35032 MARBURG,GERMANY

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.48.11480

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show by means of time-resolved four-wave-mixing experiments that the simultaneous excitation of energetically distinct and inhomogeneously broadened exciton transitions associated with spatially separated quantum-well islands leads to a beating photon echo. This shows that the exciton transitions cannot be described by uncoupled two-level systems. We discuss bleaching, screening, and dipole-dipole interaction as possible coupling mechanisms.

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页码：11480 / 11483

页数：4

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