ELECTROOPTIC DETECTION OF BLOCH OSCILLATIONS

被引：134

作者：

DEKORSY, T ^{[1
]}

LEISCHING, P ^{[1
]}

KOHLER, K ^{[1
]}

KURZ, H ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.50.8106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coherent motion of electronic wave packets in the Wannier-Stark regime of externally biased GaAs/AlxGa1-xAs superlattices is investigated by a time-resolved electro-optic technique. As predicted by the semiclassical theory, electronic wave packets undergo Bloch oscillations. They are observed via anisotropic changes in the refractive index associated with a intraband polarization, which is set up by the coherent spatial motion of electronic wave packets relative to localized holes. The oscillation amplitude depends strongly on the initial excitation conditions. Frequency, amplitude, and dephasing of Bloch oscillations are investigated over a wide range of electric fields. Complementary results to four-wave mixing and THz emission experiments are obtained.

引用

页码：8106 / 8109

页数：4

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