Photoresponse of a two-dimensional electron gas at the second harmonic of the cyclotron resonance

被引：19
作者：
Bialek, M. [1 ]
Lusakowski, J. [1 ]
Czapkiewicz, M. [2 ]
Wrobel, J. [2 ,3 ]
Umansky, V. [4 ]
机构：
[1] Univ Warsaw, Fac Phys, PL-02093 Warsaw, Poland
[2] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[3] Rzeszow Univ, Fac Math & Nat Sci, PL-35959 Rzeszow, Poland
[4] Weizmann Inst Sci, IL-76100 Rehovot, Israel
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 04期
关键词：
MAGNETIC-FIELD; SUBHARMONIC STRUCTURE; TERAHERTZ RADIATION; BERNSTEIN MODES; PLASMA; OSCILLATIONS; WAVES; LAYER;
D O I：
10.1103/PhysRevB.91.045437
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Terahertz spectroscopy experiments at magnetic fields and low temperatures were carried out on samples of different gate shapes processed on a high electron mobility GaAs/AlGaAs heterostructure. For a given radiation frequency, multiple magnetoplasmon resonances were observed with a dispersion relation described within a local approximation of the magnetoconductivity tensor. The second harmonic of the cyclotron resonance was observed and its appearance was interpreted as resulting from a high-frequency, inhomogeneous electromagnetic field on the border of a two-dimensional electron gas with a metallic gate and/or an ohmic contact.
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