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Magnetic dipolar modes in magnon-polariton condensates
Journal of Modern Optics ( IF 1.2 ) Pub Date : 2021-09-29 , DOI: 10.1080/09500340.2021.1980128
E. O. Kamenetskii 1
Affiliation  

For dipole-carrying excitations observed in a high-quality resonator, strong-coupling modes can appear as composite bosons with the spontaneous formation of quantized vortices in the condensed phase of a polariton fluid. In this paper, we show that magnon-polaritons can be realized due to magnon condensation caused by magnetic dipole-dipole interaction. In a quasi-2D ferrite disk placed in a microwave cavity, one observes quantum confinement effects of magnetic-dipolar-mode (MDM) oscillations. These modes, characterized by energy eigenstates with rotational superflows and quantized vortices, are exhibited as spinor condensates. Along with the condensation of MDM magnons, electric dipole condensation is also observed. At the MDM resonances, transfer between angular momenta in the magnetic insulator and in the vacuum cavity, demonstrates generation of vortex flows with fixed handedness. The unique topological properties of the polariton are manifested by curved wavefronts and supperradiance effects in microwave structures. In an environment of scattering states of microwave waveguide, electromagnetic (EM) waves can carry topological phases of MDM resonances.



中文翻译:

磁极化子凝聚中的磁偶极模式

对于在高质量谐振器中观察到的携带偶极子的激发,强耦合模式可以表现为复合玻色子,在极化流体的凝聚相中自发形成量子化涡旋。在本文中,我们表明磁偶极子-偶极子相互作用引起的磁振子凝聚可以实现磁振子极化子。在放置在微波腔中的准二维铁氧体盘中,人们观察到磁偶极模式 (MDM) 振荡的量子限制效应。这些模式以具有旋转超流和量子化涡旋的能量本征态为特征,表现为自旋凝聚体。随着 MDM 磁振子的凝聚,还观察到电偶极子凝聚。在 MDM 共振中,在磁绝缘体和真空腔中的角动量之间传递,演示了具有固定旋向性的涡流的生成。极化子的独特拓扑性质通过微波结构中的弯曲波前和超辐射效应表现出来。在微波波导散射态的环境中,电磁 (EM) 波可以携带 MDM 共振的拓扑相位。

更新日期:2021-11-23
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