二维电子系统的多重光激发：双色磁阻振荡的再研究
Multiple photoexcitation of two-dimensional electron systems: bichromatic magnetoresistance oscillations revisited
摘要：
从理论上分析了多辐射源照射下高迁移率二维电子系统的磁电阻。特别是，我们研究了微波诱导的电阻振荡的打击效果的影响。我们认为中等辐射强度，而不达到零电阻状态制度。我们使用辐射驱动的拉莫尔轨道模型扩展到几个光源。首先，我们研究了两个不同的辐射在同一方向上偏振不同或相同的频率的情况。对于这两种情况，我们发现一个制度的叠加或干涉的谐波运动。当频率不同时，我们得到了脉冲和拍频调制的磁电阻响应。另一方面，当频率相同时，我们发现最终结果将取决于两个辐射场之间的相位差，从响应增强到振荡完全崩溃，达到类似于黑暗的结果。最后，我们考虑一个多光激发的情况下（三个不同的频率），我们提出的二维电子系统作为一个潜在的微波纳米天线设备。
英文摘要：
We analyze theoretically magnetoresistance of high mobility two-dimensional electron systems being illuminated by multiple radiation sources. In particular, we study the influence on the striking effect of microwave-induced resistance oscillations. We consider moderate radiation intensities without reaching the zero resistance states regime. We use the model of radiation-driven Larmor orbits extended to several light sources. First, we study the case of two different radiations polarized in the same direction with different or equal frequencies. For both cases we find a regime of superposition or interference of harmonic motions. When the frequencies are different, we obtain a modulated magnetoresistance response with pulses and beats. On the other hand, when the frequencies are the same, we find that the final result will depend on the phase difference between both radiation fields going from an enhanced response to a total collapse of oscillations, reaching an outcome similar to darkness. Finally, we consider a multiple photoexcitation case (three different frquencies) where we propose the two-dimensional electron system as a potential nanoantenna device for microwaves.
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