超材料金属板透视装置设计

Design of perspective device of metallic plate based on metamaterials

基于变换光学方法,提出了金属板透视装置,导出了其介电常数和磁导率分布,并采用有限元分析软件COMSOL进行了证实。仿真了TE波和线电流源激励下的透视特性,并详细讨论了透视装置互补区和恢复区的相对位置及其损耗对透视特性的影响,结果表明:TE波和线电流源激励下该装置均有透视功能,并且其透视特性不受互补区和恢复区相对位置变化的影响;电磁波透过金属板时,在金属板与互补区交界面上形成强场区,相对损耗小于10-7对强场区电场强度和相位无影响;当相对损耗小于10-3时,电磁波仍能够完全透过金属板。

The perspective device of metallic plate was presented.Its dielectric constant and magneto conductivity were deduced based on optical transform method,and confirmed by the finite element software COMSOL.The performances of the device under TE wave and current line source irradiation were simulated.The impacts of the loss of metamaterials,and the relative position of the complementary medium and restored medium on its properties were analyzed.Results show that the device works well under TE wave and current line source irradiation,and perspective porformance is independent on the relative position of the complementary medium and restored medium.When electromagnetic wave irradiates the metallic plate,high-intensity local field is observed at the interface between the plate and the complementary medium.Relative loss of the metamaterials has no influence on the intensity and the phase of electric field when it is less than 10-7;electromagnetic field can completely penetrate the metallic plate when relative loss is less than 10-3.