Imaging of magnetoplasmons excited in a two-dimensional electron gas

被引：7
|
作者：
Baskin, I. [1 ]
Ashkinadze, B. M. [1 ]
Cohen, E. [1 ]
Pfeiffer, L. N. [2 ]
机构：
[1] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel
[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 04期
基金：
美国国家科学基金会;
关键词：
GAAS/ALGAAS HETEROSTRUCTURES; RESONANCE;
D O I：
10.1103/PhysRevB.84.041305
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on the direct observation of magnetoplasmon modes that are excited in a laterally confined two-dimensional electron gas (2DEG) by microwave radiation. The magnetoplasmon polaritons were imaged using spatially resolved photoluminescence (PL) spectroscopy of GaAs heterostructures, and their dependence on an external magnetic field and 2DEG density were studied. The PL pattern formation originates in the PL spectrum modulation by electrons that are heated by the local electric field of the magnetoplasmons. We revealed remarkable spatial oscillations of the microwave electric field in the samples containing a high mobility 2DEG.
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页数：4
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