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arXiv 1804.02683cond-mat.mes-hall
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磁振子的光学冷却

Optical cooling of magnons

Sanchar Sharma, Yaroslav M. Blanter, Gerrit E. W. Bauer

摘要:

自旋波对光的非弹性光的散射在光场和磁化场之间产生能量流,该过程可以通过将光集中在磁光谐振器中来增强和控制。在这里,我们使用单色激光源模拟了由磁性绝缘体(如钇铁石榴石(YIG))制成的球体的冷却。当磁振子寿命比光学寿命大得多时,我们可以把光学寿命看作是磁振子的马尔可夫浴。稳态的磁振子是正则分布的,其温度由光强度控制。我们预测,这样的冷却过程可以显着降低当前技术内的磁序的温度。

英文摘要:

Inelastic scattering of light by spin waves generates an energy flow between the light and magnetization fields, a process that can be enhanced and controlled by concentrating the light in magneto-optical resonators. Here, we model the cooling of a sphere made of a magnetic insulator, such as yttrium iron garnet (YIG), using a monochromatic laser source. When the magnon lifetimes are much larger than the optical ones, we can treat the latter as a Markovian bath for magnons. The steady-state magnons are canonically distributed with a temperature that is controlled by the light intensity. We predict that such a cooling process can significantly reduce the temperature of the magnetic order within current technology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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