STARK LADDER AND TEMPORAL OSCILLATIONS IN A NARROW-BAND SUPERLATTICE

被引：11

作者：

COHEN, G

BARJOSEPH, I

SHTRIKMAN, H

机构：

[1] Department of Physics, Weizmann Institute of Science

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.50.17316

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the optical properties of a narrow-band GaAs/AlxGa1-xAs superlattice, whose miniband width is of the order of the exciton binding energy. We show that the electron miniband is locally destroyed by the Coulomb interaction with the photoexcited hole. We observed a modified Stark ladder, with both the positive and negative orders apearing above the zero-order transition. We find field-dependent temporal oscillations in four-wave-mixing experiments. We show that they are quantum beats between electron states in neighboring sites. © 1994 The American Physical Society.

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页码：17316 / 17319

页数：4

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