COUPLING OF QUANTUM DOTS ON GAAS

被引：285

作者：

LORKE, A

KOTTHAUS, JP

PLOOG, K

机构：

[1] UNIV MUNICH,PHYS SECT,W-8000 MUNICH 22,GERMANY

[2] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.64.2559

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

With far-infrared spectroscopy, coupling between electron quantum dots becomes visible in the electronic excitation spectrum. We employ gated GaAs-AlGaAs quantum wells that enable field-effect tuning of the coupling between adjacent dots. For noninteracting quantum dots in a magnetic field we observe the characteristic edge- and bulk-mode spectrum.. The coupling of dots is reflected by a branching of the bulk mode into a cyclotron-resonance-like and a magnetoplasmonlike mode and a splitting of the edge mode. The latter is caused by formation of new edge orbits embracing two adjacent dots. © 1990 The American Physical Society.

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页码：2559 / 2562

页数：4

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