Electrically injected spin-vertical cavity surface emitting lasers for ultrafast data communication

在自旋控制垂直腔面发射激光器（自旋vcsels）中，可以诱导比传统强度动态更快的极化动力学，可以通过双折射等各向异性来控制，并且有可能实现超过200 GHz的调制频率。因此，这种方法使光数据通信的调制频率比现有技术的实际状态快一个数量级。本项目的第一个主要目标是通过实验和模拟分析自旋诱导极化动力学，以了解极化动力学的物理原理，并利用超快偏振调制的潜力达到太赫兹范围。基于这种理解，我们的第二个主要目标是为第一个具有超快调制能力的室温电注入自旋vcsel开发一个概念和架构，并首次实现这样的设备。

In spin-controlled vertical-cavity surface-emitting lasers (spin-VCSELs), polarization dynamics can be induced which is faster than the conventional intensity dynamics, can be controlled by anisotropies like birefringence, and potentially enables modulation frequencies beyond 200 GHz. Thus, this approach enables modulation frequencies for optical data communication that are faster by one order of magnitude than the actual state of the art. The first major goal of this project is to analyze the spin-induced polarization dynamics by experiment and simulation in order to understand the physics of the polarization dynamics and to exploit the potential for an ultrafast polarization modulation up to the Terahertz range. Based on this understanding, our second major goal is to develop a concept and an architecture for the first room-temperature electrically injected spin-VCSELs with ultrafast modulation capability and to realize such a device for the first time.