罗兰自旋波谱仪的实验验证
Experimental Demonstration of a Rowland Spectrometer for Spin Waves
摘要：
我们实验演示了一个自旋波罗兰光谱仪的操作。在所提出的装置几何形状中，自旋波在衍射光栅上被相干地激发，并且形成在空间上分离入射信号的光谱分量的干涉图案。衍射光栅是通过聚焦离子束辐照产生的，发现聚焦离子束辐照局部消除了YIG的亚铁磁性质，而不去除材料。我们发现，在我们的实验中，自旋波产生的间接机制，通过利用光栅和共面波导之间的非线性共振。我们的工作为复杂的自旋波光学器件铺平了道路-在芯片级上复制集成光学器件功能的芯片。
英文摘要：
We experimentally demonstrate the operation of a spin-wave Rowland spectrometer. In the proposed device geometry, spin waves are coherently excited on a diffraction grating and form an interference pattern that spatially separates spectral components of the incoming signal. The diffraction grating was created by focused-ion-beam irradiation, which was found to locally eliminate the ferrimagnetic properties of YIG, without removing the material. We found that in our experiments spin waves were created by an indirect mechanism, by exploiting nonlinear resonance between the grating and the coplanar waveguide. Our work paves the way for complex spin-wave optic devices -- chips that replicate the functionality of integrated optical devices on a chip-scale.
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