论文标题
二维电子气体边缘的第二次谐波生成
Second harmonic generation at the edge of a two-dimensional electron gas
论文作者
论文摘要
我们表明，以频率$ω$振荡的平面电场驱动二维电子气体，在系统边缘附近流动的$2Ω$以$2Ω$的形式驱动电流。该电流既具有平行且垂直于边缘成分，它们的电磁波以$2Ω$散发出不同的极性。我们开发了这种边缘第二个谐波生成的微观理论，并在电子传输和电场筛选的不同状态下以$2Ω$计算边缘电流。我们还表明，在高频率上，边缘电流的空间轮廓包含因血浆波的激发引起的振荡。
We show that driving a two-dimensional electron gas by an in-plane electric field oscillating at the frequency $ω$ gives rise to an electric current at $2ω$ flowing near the edge of the system. This current has both parallel and perpendicular to the edge components, which emit electromagnetic waves at $2ω$ with different polarizations. We develop a microscopic theory of such an edge second harmonic generation and calculate the edge current at $2ω$ in different regimes of electron transport and electric field screening. We also show that at high frequencies the spatial profile of the edge current contains oscillations caused by excitation of plasma waves.
