论文标题
在微腔中电子和激子 - 果龙之间增强的散射
Enhanced scattering between electrons and exciton-polaritons in a microcavity
论文作者
论文摘要
强烈的光结合相互作用与电荷掺杂之间的相互作用代表了追求异国情调的多体物理学和光电子学的重要边界。在这里，我们考虑了一个嵌入在微腔中的二维半导体的简化模型，在该模型中，对电子和孔之间的相互作用进行了强烈筛选，从而使我们可以为该系统开发图形形式，并具有对激子polarton传播器的分析表达式。我们将其应用于自旋极化的偏振子和电子的散射，并表明与激子 - 电子相互作用相比，这是强大的增强。正如我们所说，这种违反直觉结果是由于强烈的光耦合而导致碰撞能量的变化的结果，因此，这是一种通用特征，也适用于更真实的电子孔和电子电子相互作用。我们此外表明，在光结合系统中固有的固有的galilean不变性可能会导致靠近北极星拐点接近的极性电子相互作用的狭窄谐振特征。我们的结果对于实现带电颗粒之间的可调光介导的相互作用至关重要。
The interplay between strong light-matter interactions and charge doping represents an important frontier in the pursuit of exotic many-body physics and optoelectronics. Here, we consider a simplified model of a two-dimensional semiconductor embedded in a microcavity, where the interactions between electrons and holes are strongly screened, allowing us to develop a diagrammatic formalism for this system with an analytic expression for the exciton-polariton propagator. We apply this to the scattering of spin-polarized polaritons and electrons, and show that this is strongly enhanced compared with exciton-electron interactions. As we argue, this counter-intuitive result is a consequence of the shift of the collision energy due to the strong light-matter coupling, and hence this is a generic feature that applies also for more realistic electron-hole and electron-electron interactions. We furthermore demonstrate that the lack of Galilean invariance inherent in the light-matter coupled system can lead to a narrow resonance-like feature for polariton-electron interactions close to the polariton inflection point. Our results are potentially important for realizing tunable light-mediated interactions between charged particles.
