Microwave Spectroscopy of a Single Permalloy Chiral Metamolecule on a Coplanar Waveguide
Microwave Spectroscopy of a Single Permalloy Chiral Metamolecule on a Coplanar Waveguide
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共面波导上单个坡莫合金手性超分子的微波光谱
DOI：
10.1103/physrevapplied.9.054025
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发表时间：
2018
影响因子：
4.6
通讯作者：
Yanagi Hisao
中科院分区：
文献类型：
--
作者：
Kodama Toshiyuki;Kusanagi Yusaku;Okamoto Satoshi;Kikuchi Nobuaki;Kitakami Osamu;Tomita Satoshi;Hosoito Nobuyoshi;Yanagi Hisao
研究了微米级单坡莫合金(Py)手性结构在共面波导(CPW)上的微波光谱。在垂直于微波传播方向的外加直流磁场作用下，加载在共面波导信号线中心的Py手性结构呈现Kittel模式的铁磁共振。相比之下，信号线边缘的结构突出了两个额外的共振：在较高频率的自旋波共振，以及在大约7.8 GHz的较低频率的独特共振。7.8 GHz处的共振信号源于磁感应几何驱动的共振，尽管共振频率不依赖于外部磁场。此外，Py结构在信号线上的位移导致了非互易微波传输，这可以追溯到边缘导模。
We investigate the microwave spectroscopies of a micrometer-sized single permalloy (Py) chiral structure on coplanar waveguides (CPWs). Under an external dc magnetic field applied in a direction perpendicular to the microwave propagation, the Py chiral structure loaded on the center of the CPW signal line shows Kittel-mode ferromagnetic resonance. Contrastingly, the structure on the signal-line edge highlights two additional resonances: spin-wave resonance at a higher frequency, and unique resonance at a lower frequency of approximately 7.8 GHz. The resonance signal at 7.8 GHz originates from magnetically induced, geometry-driven resonance, although the resonance frequency does not depend on the external magnetic field. Moreover, the displacement of the Py structures on the signal line results in nonreciprocal microwave transmission, which is traced back to the edge-guide mode.