Controlling the phase of light in magnetoplasmonic structures is receiving increasing attention because of its already shown capability in ultrasensitive and label-free molecular-level detection.Magneto-optical Kerr r...Controlling the phase of light in magnetoplasmonic structures is receiving increasing attention because of its already shown capability in ultrasensitive and label-free molecular-level detection.Magneto-optical Kerr reversal has been achieved and well explained in nanodisks by using the phase of localized plasmons.In this paper,we report that the Kerr reversal can also be produced by surface plasmon polaritons independently.We experimentally confirm this in Co and Ag/Co/Ag metal nanogratings,and can give a qualitative explanation that it is the charge accumulation at the interface between the grating surface and air that acts as the electromagnetic restoring force to contribute necessary additional phase for Kerr reversal.Our finding can enrich the means of designing and fabricating magneto-optical-based biochemical sensors.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11374146)the China Postdoctoral Science Foundation(Grant No.2018M632278)the Jiangsu Provincial Planned Projects for Postdoctoral Research Funds,China(Grant No.1701092C)
文摘Controlling the phase of light in magnetoplasmonic structures is receiving increasing attention because of its already shown capability in ultrasensitive and label-free molecular-level detection.Magneto-optical Kerr reversal has been achieved and well explained in nanodisks by using the phase of localized plasmons.In this paper,we report that the Kerr reversal can also be produced by surface plasmon polaritons independently.We experimentally confirm this in Co and Ag/Co/Ag metal nanogratings,and can give a qualitative explanation that it is the charge accumulation at the interface between the grating surface and air that acts as the electromagnetic restoring force to contribute necessary additional phase for Kerr reversal.Our finding can enrich the means of designing and fabricating magneto-optical-based biochemical sensors.
基金ACKNOWLEDGMENTS This work was supported by the National Nature Science Foundation of China （No.50171033）, the National Key Project of Fundamental Research of China （No.2005CB623605）, and the Scientific Research Foundation for the Doctor of Hefei University of Technology （No.035032）.
文摘磁场在 Fe <SUB>48</SUB 的性质上退火的效果 > 公司 <SUB>52</SUB> 合金 nanowire 数组与各种各样内部电线距离(D <SUB > i </SUB>= 30 60 nm ) 并且电线直径(D <SUB > w </SUB>= 22 46 nm ) 详细被调查。数组的最好的退火温度和水晶的结构没在在退火的过程期间沿着电线使用 3 kOe 磁场的处理上显示出任何明显的依赖，这被发现。为有小 D <SUB 的数组 > w </SUB> 或与大 D <SUB > i </SUB>, 磁场退火的处理也没在他们的磁性的表演上有明显的影响。然而，退火的如此的一个磁场抑制了容易的磁化方向的移动并且与大 D <SUB 为数组显然改进了 coercivity 和方形 > w </SUB> 或与小 D <SUB > i </SUB> 。在在数组以内的有效的各向异性的地的紧张的差别被相信为数组在磁场退火以后的磁性的这个不同变化负责。
