High-frequency self-sustained current oscillation in an Esaki-Tsu superlattice monitored via microwave emission

被引:84
作者
Hofbeck, K
Grenzer, J
Schomburg, E
Ignatov, AA
Renk, KF
Pavelev, DG
Koschurinov, Y
Melzer, B
Ivanov, S
Schaposchnikov, S
Kopev, PS
机构
[1] UNIV REGENSBURG,INST ANGEW PHYS,D-93040 REGENSBURG,GERMANY
[2] NIZHNY NOVGOROD STATE UNIV,DEPT RADIOPHYS,NIZHNII NOVGOROD,RUSSIA
[3] ST PETERSBURG PHYSICOTECH INST,IOFFE INST,ST PETERSBURG,RUSSIA
关键词
Esaki-Tsu superlattice; Bragg reflection; Bloch oscillations; space charge instabilities; current oscillation; microwave radiation;
D O I
10.1016/0375-9601(96)00367-2
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report the observation of a high-frequency self-sustained current oscillation in an n doped GaAs/AlAs superlattice (at room temperature) that shows a negative differential conductance (Satiates superlattice). The superlattice biased in the region of the negative differential conductance emitted microwave radiation at a fundamental frequency of about 6 GHz and at harmonics. We attribute the oscillation to space charge instabilities inside the superlattice caused by Bragg reflection of electrons in the lowest, wide miniband.
引用
收藏
页码:349 / 353
页数:5
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