基于类焦散自旋波束的磁逻辑网络频分复用
Frequency-Division Multiplexing in Magnonic Logic Networks Based on Caustic-Like Spin-Wave Beams
摘要：
利用自旋波及其量子（磁振子）进行波基数据处理是克服CMOS逻辑网络所面临的挑战的一种很有前途的技术。这些准粒子的优势在于它们在微米至纳米尺度上实现节能器件的潜力，这是由于它们在磁性材料中的无电荷传播。本文通过微磁学模拟研究了类焦散自旋波光束在微结构铁磁体中传播方向的频率依赖性。基于所观察到的传播角的变化，展示了空间组合和分离不同频率的自旋波信号的方法。所提出的磁结构构成了一个原型设计的无源电路，使频分复用的磁振子逻辑网络。它被证实，不同频率的自旋波信号可以同时通过该设备传输，没有任何相互作用或产生的寄生信号。由于磁振子网络中的基于波的计算方法，频分复用技术可以成为单磁振子设备中并行数据处理的基础，从而实现数据吞吐量的倍增。
英文摘要：
Wave-based data processing by spin waves and their quanta, magnons, is a promising technique to overcome the challenges which CMOS-based logic networks are facing nowadays. The advantage of these quasi-particles lies in their potential for the realization of energy efficient devices on the micro- to nanometer scale due to their charge-less propagation in magnetic materials. In this paper, the frequency dependence of the propagation direction of caustic-like spin-wave beams in microstructured ferromagnets is studied by micromagnetic simulations. Based on the observed alteration of the propagation angle, an approach to spatially combine and separate spin-wave signals of different frequencies is demonstrated. The presented magnetic structure constitutes a prototype design of a passive circuit enabling frequency-division multiplexing in magnonic logic networks. It is verified that spin-wave signals of different frequencies can be transmitted through the device simultaneously without any interaction or creation of spurious signals. Due to the wave-based approach of computing in magnonic networks, the technique of frequency-division multiplexing can be the basis for parallel data processing in single magnonic devices, enabling the multiplication of the data throughput.
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