Computational analysis of nonlinear electromagnetics in disordered photonic systems

几个世纪以来，物理学家已经知道如何利用麦克斯韦定律来预测光和其他类型的电磁辐射在真空中移动时的行为;然而，当它在无序介质中传播时，就像我们在开发新的工程设备时使用的那样，人们依赖于非常粗略的近似或粗略的估计来预测会发生什么。这些PI将开发新的计算机模拟系统，以比过去更准确地预测发生的事情。他们的新工具应该在光子学和电子光学领域，在开发新设备和新技术方面得到非常广泛的使用。他们计划广泛传播新的软件，使世界各地的科学家能够进行这一主题的研究。该项目将集中开发一个精确和计算效率高的自洽麦克斯韦-布洛赫方程的综合求解器。这将需要开发（1）区域分解框架;（2）用于辐射/散射瞬态分析的半分析方法;以及（3）可以与这些求解器集成以实现无序系统的大规模分析的快速势评估器。 该框架将提供各种无序系统中光和光激发（激子）的动力学的完整图像，从无序的垂直腔面发射激光器（VCSEL）结构开始。另一个作为试验平台的系统是嵌入半导体中的量子点，有和没有外部空腔。

Physicists have known for centuries how to predict the behavior of light and other types of electromagnetic radiation when it moves through a vacuum, using Maxwell's Laws; however, when it propagates through disorderly media, like those we use in developing new engineering devices, people have relied on very gross approximations or back-of-the-envelope estimates to predict what will happen. These PIs will develop new computer simulation systems to predict what happens more accurately than has been possible in the past. Their new tools should be of very widespread use, in photonics and electrooptics, in developing new devices and technologies. They plan to disseminate the new software widely to enable scientists worldwide to conduct research on this topic.The project will focus on developing an integrated solver for self-consistent Maxwell-Bloch equations that is accurate and computationally efficient. This will entail the development of (1) a domain decomposition framework; (2) semi-analytical methods for transient analysis of radiation/scattering; and (3) fast potential evaluators that can be integrated with these solvers to enable large-scale analysis of disordered systems. The framework will provide a complete picture of the dynamics of light and optical excitations (excitons) in a variety of disordered systems, starting with Vertical Cavity Surface Emitting Laser (VCSEL) structures with disorder. Another system to be investigated as a testbed is the case of quantum dots embedded in a semiconductor with and without an external cavity.