Microscopic Theory of the Optical Properties of Metastable Semiconductor Compounds and Heterostructures

进一步发展了半导体光学和电子性质的微观理论，并将其应用于亚稳态半导体化合物的线性和非线性光学性质的建模。除了分析时间分辨、泵浦探测和四波混频光谱外，主要目标是为高激发系统的增益和发光光谱以及激光作用提供一个适当的理论。为此，有必要解决相关的能带结构问题，研究载流子输运到有源区，并解决基本的结构特性。理解和建模的微观过程，确定的光学响应是一个关键的步骤，以实现一个控制的方式设计异质结构的最佳性能。在这个项目中，计划与生长，表征和分析亚稳态半导体化合物结构的实验人员密切合作。这种理论和实验研究的协同结合在过去是非常成功的，应该使我们能够开发和改进基于新材料的异质结构。

The microscopic theory for the optical and electronic properties of semiconductors is further developed and applied to model the linear and nonlinear optical properties of metastable semiconductor compounds. Besides analyzing time-resolved pumpprobe and four-wave-mixing spectroscopy the main goal is to provide an adequate theory for the gain and luminescence spectra and laser action in highly excited systems. For this purpose it is necessary to resolve the relevant bandstructure issues, study the carrier transport into the active regions, and address the essential structural properties. The understanding and modeling of the microscopic processes that determine the optical response is a crucial step in order to achieve a controlled way of designing heterostructures with optimal properties. In this project it is planned to closely collaborate with experimentalists who grow, characterize and analyze the metastable semiconductor compound structures. This synergistic combination of theoretical and experimental investigations has been very successful in the past and should enable us to develop and improve also heterostructures based on the new materials.