Bernstein modes in density-modulated two-dimensional electron systems and quantum dots

被引：9
|
作者：
Krahne, R
Hochgräfe, M
Heyn, C
Heitmann, D
机构：
[1] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany
[2] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany
来源：
PHYSICAL REVIEW B | 2000年 / 61卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.61.R16319
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have prepared two-dimensional electron systems (2DES) in AlxGa1-xAs/GaAs heterostructures with laterally structured gate electrodes which allow us to tune the system from a density-modulated 2DES into a periodic array of isolated quantum dots. At small modulation amplitudes, with far-infrared transmission spectroscopy in a magnetic field, we observe the expected interaction of the magnetoplasmon with the Bernstein modes at harmonics n omega(c) of the cyclotron frequency omega(c) (n = 2,3 . . .). For large modulation, we find modes which occur below these resonances, e.g., in the regime omega(c) to 2 omega(c).
引用
收藏
页码：R16319 / R16322
页数：4
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