Akram Haneen, Al-Khursan Amin H
Appl Opt. 2016 Dec 1;55(34):9866-9874. doi: 10.1364/AO.55.009866.
Second-order nonlinear susceptibility (SONS) in a ladder-plus-Y double quantum dot structure was modeled and then studied numerically under the application of an electric field. The density matrix theory was used to formulate the system while the orthogonalized plane waves for wetting layer-quantum dot (WL-QD) were considered to state the momentum matrix elements for this system. It is found that the momenta follow the smallest energy difference between states with an obvious overlap of the mediated states. Since WL-QD momenta are small, neglecting WL gives high SONS. Millimeter waves are predicted, and a huge SONS can be obtained by the application of more optical fields, which is important in medical and biological applications. The possibility of changing light speed between subluminal and superluminal was predicted here. This opens the way for many applications like multichannel waveguide-multichannel quantum information processing, real quality imaging, and temporal clock.
对梯形加 Y 型双量子点结构中的二阶非线性极化率（SONS）进行了建模，然后在电场作用下进行了数值研究。利用密度矩阵理论对该系统进行公式化表述，同时考虑用于润湿层 - 量子点（WL - QD）的正交平面波来阐述该系统的动量矩阵元。研究发现，动量遵循具有明显重叠的介导态之间的最小能量差。由于 WL - QD 动量较小，忽略 WL 会得到较高的 SONS。预测了毫米波，并且通过施加更多光场可以获得巨大的 SONS，这在医学和生物学应用中很重要。这里预测了在亚光速和超光速之间改变光速的可能性。这为多通道波导 - 多通道量子信息处理、真实质量成像和时间时钟等许多应用开辟了道路。
