论文标题
电子诱导的电流由电子对液氦的微波鲜明效应
Electric Current Induced by Microwave Stark Effect of Electrons on Liquid Helium
论文作者
论文摘要
我们提出了在漂浮在液态氦表面上的电子的低温系统中Terahertz（THZ）和Gigahertz（GHz）电磁波的频率混合作用。 THZ波与最低两个表面状态电子水平之间的过渡频率几乎具有共振。 GHz波不会激发过渡，而是产生了与液体氦气上电子的对称特征状态相关的鲜明效应。我们显示了输入THZ和GHz波之间的有效耦合，这表明电子和THZ波之间的失沟等于GHz波的频率。通过这种耦合，THZ和GHz波会沿着液态氦表面的垂直方向产生相同的电子，并产生低频AC电流，可通过图像荷尔兰方法[Phys [phys]实验检测到实验检测到。莱特牧师。 123，086801（2019）]。这为THZ检测提供了另一种方法。
We propose a frequency-mixed effect of Terahertz (THz) and Gigahertz (GHz) electromagnetic waves in the cryogenic system of electrons floating on liquid helium surface. The THz wave is near-resonant with the transition frequency between the lowest two levels of surface state electrons. The GHz wave does not excite the transitions but generates a GHz-varying Stark effect with the symmetry-breaking eigenstates of electrons on liquid helium. We show an effective coupling between the inputting THz and GHz waves, which appears at the critical point that the detuning between electrons and THz wave is equal to the frequency of GHz wave. By this coupling, the THz and GHz waves cooperatively excite electrons and generate the low-frequency ac currents along the perpendicular direction of liquid helium surface to be experimentally detected by the image-charge approach [Phys. Rev. Lett. 123, 086801 (2019)]. This offers an alternative approach for THz detections.
