基于零折射磁性特异电磁介质的波前调控

发布时间：2018-07-12 18:19

本文选题：零折射特异电磁介质 + Mie散射理论　；参考：《物理学报》2015年03期

【摘要】：本文基于二维磁性柱周期阵列设计了具有等效零折射率的磁性特异电磁介质.通过多重散射理论计算体系的光子能带和等效介质理论提取体系的等效电磁参量可以确定该磁性特异电磁介质可以实现等效介电常数和等效磁导率同时为零.利用该双零磁性特异电磁介质可以实现电磁波在无相位延迟下的传输,从而可以调控电磁波的空间相位变化.进而,通过设计具有不同电磁波输出界面的构型实现了高斯光束的波前由平面转变成柱面,还可以实现高斯光束的聚焦和高斯光束的分束.也可以根据需要设计具有更为一般的输出界面,实现更为多样的电磁波波前的调控.而且,磁性材料的电磁特性可以通过温度和外加磁场进行调制,因此该双零磁性特异电磁介质的工作频率可以灵活控制,这更便于电磁波器件的设计和应用.
[Abstract]:In this paper, a magnetic specific electromagnetic medium with equivalent zero refractive index is designed based on two-dimensional magnetic cylindrical periodic array. By calculating the photon band of the system and the equivalent electromagnetic parameters of the system extracted by the theory of equivalent medium, the equivalent dielectric constant and the equivalent permeability of the magnetic specific electromagnetic medium can be determined to be zero at the same time. The transmission of electromagnetic wave without phase delay can be realized by using the double zero magnetic specific electromagnetic medium, thus the spatial phase change of electromagnetic wave can be regulated. Furthermore, the wavefront of Gao Si beam can be transformed from plane to cylinder by designing the configuration with different electromagnetic wave output interface. The focusing of Gao Si beam and the beam splitting of Gao Si beam can also be realized. A more general output interface can also be designed according to the need to achieve a more diverse control of electromagnetic wavefront. Moreover, the electromagnetic properties of magnetic materials can be modulated by temperature and external magnetic field, so the working frequency of the double zero magnetic specific electromagnetic medium can be flexibly controlled, which is more convenient for the design and application of electromagnetic wave devices.
【作者单位】：浙江师范大学光学研究所;复旦大学表面物理国家重点实验室;
【基金】：国家自然科学基金(批准号:11274277) 复旦大学表面物理国家重点实验室开放项目(批准号:KF2013_6) 浙江师范大学创新团队项目资助的课题~~
【分类号】：O441

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