论文标题
二维电子系统中回旋共振光电导率的循环极化免疫力
Circular polarization immunity of the cyclotron resonance photoconductivity in two-dimensional electron systems
论文作者
论文摘要
研究了GAAS和HGTE二维电子结构中的回旋子共振（CR）诱导的光导率，我们观察到CR-noctive几何形状的异常光响应几乎与CR活性相同。这种观察结果与同时传播测量结果发生冲突，并与传统的CR理论相矛盾，CR的传统理论预测了CR不可能的几何形状没有共鸣的响应。我们提供了一条可能的途径来解释光 - 物质相互作用的常规描述的这种根本性失败，并讨论近杂质附近的修改电子动力学，该动态可能会在低温下在Terahertz场的两个螺旋模式中提供局部近场耦合。这应该导致CR增强的局部吸收，从而导致两个磁场极性的CR光导不传导性。
Studying the cyclotron resonance (CR)-induced photoconductivity in GaAs and HgTe two-dimensional electron structures, we observed an anomalous photoresponse for the CR-inactive geometry being of almost the same magnitude as the CR-active one. This observation conflicts with simultaneous transmission measurements and contradicts the conventional theory of CR which predicts no resonant response for the CR-inactive geometry. We provide a possible route to explain this fundamental failure of the conventional description of light-matter interaction and discuss a modified electron dynamics near strong impurities that may provide a local near-field coupling of the two helicity modes of the terahertz field at low temperatures. This should result in a CR-enhanced local absorption and, thus, CR photoconductivity for both magnetic field polarities.
