Using two rigorous electromagnetic approaches, we study plasmon scattering in two-dimensional systems and show that plasmon amplification is possible in the presence of dc currents. Two scenarios are considered: plasmon scattering from an interface between different two-dimensional channels and plasmon reflection from electric contacts of arbitrary thickness. In each case, the effect of a dc current of the plasmon reflection and transmission coefficients and the plasmon power are both quantified. A resonant system is studied where plasmon roundtrip gain may exceed unity, showing the possibility of plasmon generation.

中文翻译：

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二维等离子体的散射诱导放大：电磁建模

我们使用两种严格的电磁方法研究二维系统中的等离子体散射，并表明在存在直流电流的情况下等离子体放大是可能的。考虑了两种情况：来自不同二维通道之间界面的等离子体散射和来自任意厚度电接触的等离子体反射。在每种情况下，等离子激元反射和传输系数的直流电流的影响以及等离子激元功率都被量化。研究了一个共振系统，其中等离子体往返增益可能超过统一，显示了等离子体生成的可能性。