论文标题
通过旋转角度动量转换产生扭曲的镁
Generation of twisted magnons via spin-to-orbital angular momentum conversion
论文作者
论文摘要
带有轨道角动量（OAM）的扭曲镁（TMS）吸引了镁质社区的广泛关注。然而，这种新颖的木农状态的制造仍然具有挑战性。在这里，我们提出了一种简单的方法，可以通过旋转角度动量转换生成具有任意径向和方位角量子数的TMS。从平面波镁到扭曲的镁的转化率对量子指数不敏感。通过分析求解薄纳米虫中TMS的光谱，显示了与微磁模拟的良好一致性。此外，我们从数值上研究了磁性纳米驱动器阵列中TMS的传播，并获得衰减长度对量子指数的定量依赖性。我们的结果有助于实现具有大型绿色的TMS，对于将来的高容量宏伟通信和计算是必不可少的。
Twisted magnons (TMs) carrying orbital angular momentum (OAM) have attracted much attention from the magnonic community. The fabrication of such novel magnon state however is still challenging. Here we present a simple method to generate TMs with arbitrary radial and azimuthal quantum numbers through the spin-to-orbital angular momentum conversion. The conversion rate from plane-wave magnons to twisted ones is shown to be insensitive to the quantum index. The spectrum of TMs in thin nanodisks is solved analytically, showing a good agreement with micromagnetic simulations. Moreover, we numerically study the propagation of TMs in magnetic nanodisk arrays and obtain the quantitative dependence of the decay length on quantum indexes. Our results are helpful for realizing TMs with large OAMs that are indispensable for future high-capacity magnonic communications and computings.
