论文标题
超微薄Yig膜中自旋波的近距离表近距离聚焦
Sub-micrometer near-field focusing of spin waves in ultrathin YIG films
论文作者
论文摘要
我们通过实验表明，在Yttrium Iron Garnet的延伸纳米厚膜中激发的自旋波束的紧密聚焦是通过简单的显微镜天线作为单缝近场镜头的简单微观天线。我们表明，可以通过改变自旋波和天线几何形状的频率/波长来控制焦点的焦距和最小横向宽度。实验数据与数值模拟的结果非常吻合。我们的发现为实施磁性纳米设备的实现提供了一种简单的解决方案，需要局部旋转波能量。
We experimentally demonstrate tight focusing of a spin wave beam excited in extended nanometer-thick films of Yttrium Iron Garnet by a simple microscopic antenna functioning as a single-slit near-field lens. We show that the focal distance and the minimum transverse width of the focal spot can be controlled in a broad range by varying the frequency/wavelength of spin waves and the antenna geometry. The experimental data are in good agreement with the results of numerical simulations. Our findings provide a simple solution for implementation of magnonic nano-devices requiring local concentration of the spin-wave energy.
