论文标题
cu $ _2 $ o rydberg激素的等离子增强互动和光学非线性
Plasma-enhanced interaction and optical nonlinearities of Cu$_2$O Rydberg excitons
论文作者
论文摘要
在最近的实验中，我们从理论上研究了通过氧化热晶体的非线性光学传递，以覆盖一系列高度激发的激发激素的波长。由于这种Rydberg激子具有强大的范德华相互作用，因此它们可以动态破坏谐振激子创建的条件，并以非线性方式大大修改材料的折射率。我们从理论上探索了这种机制，并确定了其对半导体的光学特性的影响，对于cu $ _2 $ o的rydberg激子的简并成对渐近造部分。在分析稀剩余电子孔等离子体的其他影响后，我们发现与先前的传输测量结果进行定量一致，这为通过周围的自由电荷提供了强烈的指示，可以增强Rydberg诱导的非线性。
We theoretically investigate the nonlinear optical transmission through a cuprous oxide crystal for wavelengths that cover the series of highly excited excitons, observed in recent experiments. Since such Rydberg excitons have strong van der Waals interactions, they can dynamically break the conditions for resonant exciton creation and dramatically modify the refractive index of the material in a nonlinear manner. We explore this mechanism theoretically and determine its effects on the optical properties of a semiconductor for the case of degenerate pair-state asymptotes of Rydberg excitons in Cu$_2$O. Upon analyzing the additional effects of a dilute residual electron-hole plasma, we find quantitative agreement with previous transmission measurements, which provides strong indications for the enhancement of Rydberg-induced nonlinearities by surrounding free charges.
