Microscopic theory of nanostructured laser devices with short-wavelength emission

将开发量子点激光系统的理论，以分析其特性并指导新的氮化物基激光器件的优化，这是本研究组项目I.1和I.2的主题。为了理解纳米结构和各种电子相互作用过程的相互作用，微观模型的应用将是必要的。作为中心点，将与过去已被广泛研究的量子阱系统相比，分析量子点系统中的光学增益。在项目I.2中实验研究的单量子点的光学性质是这些研究的基础。将分析载流子注入、量子限制态中的电子动力学、光学增益和实际激光器结构的腔模式的相互作用，以了解激光发射特性，如输入-输出特性和激光阈值、发射光谱和动力学特性。将研究传统的边缘发射器以及新型垂直腔表面发射激光器结构。理论模型将直接纳入项目三.1和三.2的成果。

A theory for quantum-dot laser systems will be developed to analyze the properties and to guide the optimization of new Nitride-based laser devices which are the subject of projects I.1 and I.2 of this research group. To understand the interplay of nanostructuring and various electronic interaction processes, the application of microscopic models will be necessary. As a central point, the optical gain in quantum-dot systems will be analyzed in comparison to quantum-well systems which have been extensively studied in the past. Optical properties of single quantum dots, studied experimentally in project I.2, are the basis for these investigations. The interplay of carrier injection, electron dynamics in the quantum-confined states, optical gain, and cavity modes of a realistic laser structure will be analyzed to understand the laser emission properties like input-output characteristics and laser threshold, emission spectrum, and dynamical properties. Both, conventional edge-emitters as well as novel vertical-cavity surface-emitting laser structures will be investigated. The theoretical models will directly incorporate results of projects III.1 and III.2.