Spin Waves bridging Spintronics and Photonics

自旋波桥接自旋电子学和光子学

• 批准号: 246011620
• 负责人: Dr. Helmut Schultheiß
• 金额: --
• 依托单位: Institut für Ionenstrahlphysik und Materialforschung
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/246011620?language=en
• 关键词: Spin; Waves; bridging; Spintronics; Photonics

The goal of this project is to explore fundamental connections between spin waves, spin polarized electrons and photons, combining the three recently emerged research directions of magnonics, spintronics and photonics. This research is driven by the demand for new concepts, technologies and materials for information processing since, on one side, electronics is reaching its physical limit of speed due to waste heat generation and, on the other side, photonics lacks fast, electronic control on small length scales. Spin waves, being the fundamental dynamic excitations of ferromagnets with frequencies in the gigahertz to terahertz regime, offer the unique opportunity to merge the best aspects of spintronics and photonics opening new pathways for information processing. Within the scope of this project, three objectives are in the focus of interest: The first objective is to analyze spin-wave transport and manipulation in magnetic nanostructures. This includes the characterization of novel materials and geometries as well as the investigation of the interactions between spin waves and domain walls utilizing the magneto-optical Kerr effect and Brillouin light scattering microscopy. The second objective focuses on the coupling between spin waves and spin currents that are created by the spin Hall-effect. We will analyze the excitation, amplification and detection of spin waves by spin transfer torque and spin pumping. Within our third objective, the manipulation of light by spin waves on the nanometer scale, we employ the strong magneto-optical coupling between spin waves and surface plasmons. This allows us to control the propagation of surface plasmons in nanostructures on the time scale defined by spin waves. Exploring mechanisms of coupling between spin waves and electrons on one side and spin waves and photons on the other, magnonics can close the gap between spintronics and photonics that still operate on different time and length scales.

本项目的目标是探索自旋波、自旋极化电子和光子之间的基本联系，结合最近出现的三个研究方向：磁电子学、自旋电子学和光子学。这项研究是由信息处理的新概念，技术和材料的需求驱动的，因为一方面，由于废热的产生，电子器件正在达到其速度的物理极限，另一方面，光子学在小长度尺度上缺乏快速的电子控制。自旋波，作为频率在千兆赫到太赫兹范围内的铁磁体的基本动态激发，提供了独特的机会来合并自旋电子学和光子学的最佳方面，为信息处理开辟新的途径。在这个项目的范围内，有三个目标是感兴趣的焦点：第一个目标是分析自旋波输运和操纵磁性纳米结构。这包括新材料和几何形状的表征以及利用磁光克尔效应和布里渊光散射显微镜研究自旋波和畴壁之间的相互作用。第二个目标集中在自旋霍尔效应所产生的自旋波和自旋流之间的耦合。我们将分析自旋转移矩和自旋泵浦对自旋波的激发、放大和探测。在我们的第三个目标，在纳米尺度上的自旋波操纵光，我们采用自旋波和表面等离子体之间的强磁光耦合。这使我们能够控制纳米结构中的表面等离子体的传播的时间尺度上定义的自旋波。通过探索自旋波和电子之间的耦合机制，以及自旋波和光子之间的耦合机制，磁振子可以缩小自旋电子学和光子学之间的差距，因为它们仍然在不同的时间和长度尺度上工作。