Nanoscale Confinement of All-Optical Magnetic Switching in TbFeCo - Competition with Nanoscale Heterogeneity
Nanoscale Confinement of All-Optical Magnetic Switching in TbFeCo - Competition with Nanoscale Heterogeneity
复制标题
DOI：
10.1021/acs.nanolett.5b02743
复制
发表时间：
2015-10-01
期刊：
影响因子：
10.8
通讯作者：
Duerr, Hermann A.
中科院分区：
文献类型：
--
作者：
Liu, Tian-Min;Wang, Tianhan;Duerr, Hermann A.
单飞秒光激光脉冲，足够的强度，证明了反磁化过程中被称为全光开关。金色双线天线放置在全光开关薄膜TbFeCo上。这些结构与光场共振，它们在近场产生场增强，这限制了光开关可以发生的区域。发生在天线周围和下方的磁开关使用共振x射线全息术和磁圆二色性成像。结果不仅表明了天线辅助可控开关的可行性，而且表明了开关过程的高度非均匀性，这是由于材料的非均匀性决定的。
Single femtosecond optical laser pulses, of sufficient intensity, are demonstrated to reverse magnetization in a process known as all-optical switching. Gold two-wire antennas are placed on the all-optical switching film TbFeCo. These structures are resonant with the optical field, and they create a field enhancement in the near-field which confines the area where optical switching can occur. The magnetic switching that occurs around and below the antenna is imaged using resonant X-ray holography and magnetic circular dichroism. The results not only show the feasibility of controllable switching with antenna assistance but also demonstrate the highly inhomogeneous nature of the switching process, which is attributed to the process depending on the material's heterogeneity.