Low-dimensional optoelectronic dynamics in 3D topological insulators

3D 拓扑绝缘体中的低维光电动力学

• 批准号: 237548240
• 负责人: Professor Dr. Alexander Walter Holleitner
• 金额: --
• 依托单位: Walter Schottky Institut für physikalische Grundlagen der Halbleiterelektronik (WSI)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/237548240?language=en
• 关键词: Low; dimensional; optoelectronic; dynamics; 3D

In this project, photocurrent dynamics shall be experimentally explored in nanoscale circuits, which result from the specific band structure of topological insulators. An important emphasis will be put on the polarization control and electronic read-out of Dirac-Fermions in topological insulators. In particular, one-dimensional helical states shall be examined, and a fundamental understanding of their macroscopic quantum transport shall be achieved. Moreover, ultrafast non-equilibrium photogalvanic currents shall be examined in nanowires in a time-resolved way, which are made of topological insulators. In addition, circuits from topological insulators shall be realized and explored, which have a lateral extension of just a few nanometers. The project aims at exploring new materials and concepts for integrating topological insulators into future optoelectronic circuits and detectors.

本计画将探讨奈米级电路中的光电流动力学，其起因于拓扑绝缘体的特殊能带结构。重点将放在拓扑绝缘体中的狄拉克-费米子的极化控制和电子读出。特别是，一维螺旋状态将被检查，并实现其宏观量子输运的基本理解。此外，超快非平衡光电流将在时间分辨的方式检查纳米线，这是由拓扑绝缘体。此外，拓扑绝缘体的电路将被实现和探索，其横向延伸仅为几纳米。该项目旨在探索将拓扑绝缘体集成到未来光电电路和探测器中的新材料和概念。