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

在自旋控制的垂直腔面发射激光器（spin-VCSEL）中，可以诱导偏振动态，其比常规强度动态更快，可以通过各向异性（如双折射）来控制，并且可能实现超过200 GHz的调制频率。因此，这种方法使调制频率的光数据通信是快一个数量级比现有技术的实际状态。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的偏振动力学，以了解物理的偏振动力学，并利用潜在的超快偏振调制到太赫兹范围。基于这种理解，我们的第二个主要目标是开发一个概念和架构的第一个室温电注入自旋VCSEL的超快调制能力，并实现这样的设备的第一次。

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.