An analogous laser action of magnons has become a subject of interest, and it is crucial for the study of nonlinear magnons spintronics. In this Letter, we demonstrate the magnon laser behavior based on Brillouin light scattering in a ferrimagnetic insulator sphere, which supports optical whispering gallery modes and magnon resonances. We show that the excited magnon plays what has traditionally been the role of the Stokes wave and is coherently amplified during the Brillouin scattering process, making the magnon laser possible. Furthermore, the stimulating excited magnon number increasing exponentially with the input light power can be manipulated by adjusting the external magnetic field. In addition to providing insight into magneto-optical interaction, the study of the magnon laser action will help to develop novel, to the best of our knowledge, technologies for handling spin-wave excitations, and it could affect scientific fields beyond magnonics. Potential applications range from preparing coherent magnon sources to operating on-chip functional magnetic devices.

中文翻译：

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基于布里渊光散射的磁振子激光器

磁振子的类似激光作用已经成为人们关注的主题，这对非线性磁振子自旋电子学的研究至关重要。在这封信中，我们展示了基于布里渊光在亚铁磁绝缘体球体中散射的磁振子激光行为，这支持光学耳语画廊模式和磁振子共振。我们表明，激发的马农在传统上起了斯托克斯波的作用，并在布里渊散射过程中被相干地放大，从而使马农激光器成为可能。此外，可以通过调节外部磁场来操纵随输入光功率成指数增加的激励激磁马农数。除了提供对磁光相互作用的见解之外，对磁振子激光作用的研究还将帮助开发出我们所知的新颖小说，用于处理自旋波激励的技术，它可能会影响超越磁强学的科学领域。潜在的应用范围包括从准备相干磁振子源到运行片上功能性磁器件。