二维空穴系统边缘磁等离子体振荡和巨磁等离子体共振的光电压探测
Photovoltage Detection of Edge Magnetoplasmon Oscillations and Giant Magnetoplasmon Resonances in A Two-Dimensional Hole System
摘要：
在我们的高迁移率p型AlGaAs/GaAs二维空穴样品中，我们首次在光伏测量中观察到微波诱导的B周期振荡。在我们测量的频率范围内（5 - 40 GHz），周期（ΔB）与微波频率（f）成反比。在高质量的重空穴系统中，边缘磁等离子体激元（EMP）产生了明显的振荡。在我们的有效质量非常大的孔样品中，观察到的电磁脉冲振荡既不在低频极限，也不在高频极限，并且在高磁场下电磁脉冲振荡的阻尼非常弱。同时，我们在二维浅孔系统（2DHS）中观测到巨等离子体共振信号。
英文摘要：
In our high mobility p-type AlGaAs/GaAs two-dimensional hole samples, we originally observe the B-periodic oscillation induced by microwave (MW) in photovoltage (PV) measurements. In the frequency range of our measurements (5 - 40 GHz), the period (ΔB) is inversely proportional to the microwave frequency (f). The distinct oscillations come from the edge magnetoplasmon (EMP) in the high quality heavy hole system. In our hole sample with a very large effective mass, the observation of the EMP oscillations is in neither the low frequency limit nor the high frequency limit, and the damping of the EMP oscillations is very weak under high magnetic fields. Simultaneously, we observe the giant plasmon resonance signals in our measurements on the shallow two-dimensional hole system (2DHS).
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