Magnonic crystals: towards terahertz frequencies
Magnonic crystals: towards terahertz frequencies
复制标题
DOI：
10.1088/1361-648x/ab88f2
复制
发表时间：
2020-04
期刊：
影响因子：
--
通讯作者：
Khalil Zakeri
中科院分区：
文献类型：
--
作者：
Khalil Zakeri
这篇专题评论概述了最近的实验和理论尝试设计在不同频率下工作的磁振子晶体。重点放在微观物理机制参与形成的磁振子带结构，允许以及禁止磁振子状态在各种系统中，包括薄膜，多层膜和人工磁结构。在不同的频率制度的磁振子带隙的形成的基本标准解释在这种结构中的磁振子动力学。本文讨论了设计小尺寸磁振子晶体在太赫兹和亚太赫兹频段工作的可能性。最近发现的磁振子晶体的拓扑缺陷的基础上，使用周期Dzyaloshinskiii-Moriya相互作用，概述。不同类型的磁振子晶体，能够在不同的频率范围内工作，放在一个相当统一的图片。
This topical review presents an overview of the recent experimental and theoretical attempts on designing magnonic crystals for operation at different frequencies. The focus is put on the microscopic physical mechanisms involved in the formation of the magnonic band structure, allowed as well as forbidden magnon states in various systems, including ultrathin films, multilayers and artificial magnetic structures. The essential criteria for the formation of magnonic bandgaps in different frequency regimes are explained in connection with the magnon dynamics in such structures. The possibility of designing small-size magnonic crystals for operation at ultrahigh frequencies (terahertz and sub-terahertz regime) is discussed. Recently discovered magnonic crystals based on topological defects and using periodic Dzyaloshinskii–Moriya interaction, are outlined. Different types of magnonic crystals, capable of operation at different frequency regimes, are put within a rather unified picture.