Nonlinear spin waves in micro- and nanoscopic magnetic systems based on magnetic insulator

该项目的主要目的是探索低阻尼磁性纳米系统在非线性物理中的潜力及其技术应用。特别是，在这个项目的框架内，我们将研究不同的内模和模间非线性相互作用，这些相互作用在微观系统中得到了强烈的增强。我们将通过调整磁性纳米结构的色散和非线性特性来寻找控制和加强这些相互作用的方法。除了获得基础知识外，我们还将专注于对新兴的磁振子领域至关重要的应用方面，该领域考虑使用自旋波进行纳米级的传输和信息处理。我们将讨论利用非线性效应来激发短波长自旋波，这是很难用传统的线性机制激发的，并研究参数相互作用和非定常效应放大自旋波和自旋波包的可能性。我们还将探索动态自旋波孤子实现高数据率纳米级信息传输的潜力。这些实验将在由最近开发的提离工艺制造的微结构YIG上进行，该工艺不仅可以在横向图案化的薄膜上进行实验，而且可以在具有调制厚度的结构上进行实验，从而允许有效地调节自旋波的色散特性。

The main purpose of this project is to explore the potential of low-damping magnetic nano-systems for nonlinear physics and their technical applications. In particular, within the framework of this project, we will study different intra-mode and inter-mode nonlinear interactions, which are strongly enhanced in microscopic systems. We will search for ways to control and intensify these interactions by tailoring the dispersion and nonlinear characteristics of magnetic nano-structures. In addition to gaining fundamental knowledge, we will focus on application aspects that are critically important for the emerging field of magnonics, which considers the use of spin waves for nanoscale transmission and processing of information. We will address the utilization of nonlinear effects for excitation of short-wavelength spin waves, which are difficult to excite using traditional linear mechanisms, and study the possibilities of amplification of spin waves and spin-wave packets by parametric interactions and non-stationary effects. We will also explore the potential of dynamic spin-wave solitons for the implementation of high-data rate nano-scale information transmission. These experiments will be performed on microstructured YIG fabricated by the recently developed lift-off process, which enables experiments not only on laterally patterned films, but also on structures with modulated thickness, allowing efficient adjustment of the dispersion properties of spin waves.