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arXiv 1609.08147cond-mat.mes-hallphysics.optics
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磁振子-光子混合系统的光学操纵

Optical manipulation of a magnon-photon hybrid system

C. Braggio, G. Carugno, M. Guarise, A. Ortolan, G. Ruoso

摘要:

我们展示了一个全光学方法操纵的磁化强度在1毫米的钇铁石榴石(钇铁石榴石)球放置在一个$\sim0.17\,$ T均匀磁场。由多GHz红外激光源提供的频率梳的谐波被调谐到YIG球的拉莫尔频率以驱动磁化振荡,这反过来又产生用于彻底研究该现象的辐射场。利用微波腔中磁振子-光子强耦合机制,克服了在高频和高磁化材料存在下的辐射阻尼问题。我们的研究结果表明,通过偏振旋转和强度调制的入射激光束的光磁材料的磁化矢量的超快控制的有效技术。我们最终得到单晶YIG的二阶极化率值为$\sim10^{-7}$ cm $^2$ /MW。

英文摘要:

We demonstrate an all-optical method for manipulating the magnetization in a 1-mm YIG (yttrium-iron-garnet) sphere placed in a $\sim0.17\,$T uniform magnetic field. An harmonic of the frequency comb delivered by a multi-GHz infrared laser source is tuned to the Larmor frequency of the YIG sphere to drive magnetization oscillations, which in turn give rise to a radiation field used to thoroughly investigate the phenomenon. The radiation damping issue that occurs at high frequency and in the presence of highly magnetizated materials, has been overcome by exploiting magnon-photon strong coupling regime in microwave cavities. Our findings demonstrate an effective technique for ultrafast control of the magnetization vector in optomagnetic materials via polarization rotation and intensity modulation of an incident laser beam. We eventually get a second-order susceptibility value of $\sim10^{-7}$ cm$^2$/MW for single crystal YIG.

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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