Nikolaev Kirill O, Lake Stephanie R, Mohapatra Bikash Das, Schmidt Georg, Demokritov Sergej O, Demidov Vladislav E
Institute of Applied Physics, University of Muenster, 48149 Muenster, Germany.
Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle, Germany.
Sci Adv. 2025 Sep 19;11(38):eadx2018. doi: 10.1126/sciadv.adx2018. Epub 2025 Sep 17.
Transmission and processing of information at the nanoscale using spin waves and their quanta-magnons-offer numerous advantages and opportunities that make it a promising next-generation technology for integrated electronics. The main challenges that still need to be addressed to ensure high competitiveness of magnonic devices include finding ways to efficiently amplify spin waves in nanostructures and developing nanocircuits that can operate without the need for an external bias magnetic field. Here, we demonstrate how these two challenges can be solved using nanowaveguides fabricated from a low-loss magnetic insulator. We show that using local parametric pumping with a power of only a few milliwatts, one can achieve coherent amplification of spin-wave pulses by more than two orders of magnitude at zero bias magnetic field. Our results provide a simple solution to problems that have long prevented the implementation of efficient integrated magnonic circuits.
利用自旋波及其量子——磁振子在纳米尺度上进行信息的传输和处理具有众多优势和机遇，使其成为集成电子学一项很有前景的下一代技术。为确保磁振子器件具有高竞争力仍需解决的主要挑战包括找到有效放大纳米结构中自旋波的方法，以及开发无需外部偏置磁场即可运行的纳米电路。在此，我们展示了如何使用由低损耗磁性绝缘体制造的纳米波导来解决这两个挑战。我们表明，通过仅几毫瓦的局部参数泵浦，在零偏置磁场下可以实现自旋波脉冲的相干放大超过两个数量级。我们的结果为长期以来阻碍高效集成磁振子电路实现的问题提供了一个简单的解决方案。
