A gigahertz-range spin-wave filter composed of width-modulated nanostrip magnonic-crystal waveguides
A gigahertz-range spin-wave filter composed of width-modulated nanostrip magnonic-crystal waveguides
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DOI：
10.1063/1.3186782
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发表时间：
2009-08-24
影响因子：
4
通讯作者：
Han, Dong-Soo
中科院分区：
文献类型：
--
作者：
Kim, Sang-Koog;Lee, Ki-Suk;Han, Dong-Soo
我们发现了一种坚固的磁晶体波导结构，它可以作为一种高效的千兆赫范围自旋波滤波器，只通过选定的窄带频率的自旋波，过滤掉其他频率。该结构由具有不同周期和图案的各种宽度调制序列组合在由单一软磁材料组成的平面图案薄膜纳米带中组成。观测到的磁隙是一维宽度调制的平移对称性和宽度调制周期性边缘阶跃散射激发的高量子化宽模自旋波共同作用的结果。这项工作使我们离自旋波在信息传输和处理设备中的实际实现又近了一步。
We found a robust magnonic-crystal waveguide structure for use as an efficient gigahertz-range spin-wave filter that passes only spin waves of chosen narrow band frequencies and filters out the other frequencies. The structure consists of the serial combinations of various width modulations with different periodicities and motifs in planar-patterned thin-film nanostrips composed of a single soft magnetic material. The observed magnonic band gaps result from both the translation symmetry of the one-dimensional width modulation and the higher-quantized width-mode spin waves excited from scattering at the periodic edge-steps of the width modulation. This work brings us one step closer to practical implementations of spin waves in information transmission and processing devices.