Awan Z A
Appl Opt. 2015 Apr 10;54(11):3323-30. doi: 10.1364/AO.54.003323.
An analytical theory for the dipolar scattering characteristics of uncoated or coated sphere with different materials is presented. These materials are magnetodielectric, single negative, single near zero, and double near zero (DNZ) materials. It is shown that an uncoated magnetodielectric sphere has nearly identical E- and H-plane scattered intensities. It is further observed that for an epsilon near zero (ENZ) sphere, the intensity of scattered field in the E plane is nearly isotropic. For a coated sphere, it is shown that a magnetodielectric sphere coated with ENZ and mu near zero materials have nearly identical E-plane scattered intensities in the forward and backward scattering (BS) directions. Likewise, it is also shown that a finite sized magnetodielectric sphere coated with a DNZ layer can be made hidden to the incoming wave in the BS direction.
提出了一种用于分析不同材料的未涂层或涂层球体偶极散射特性的理论。这些材料包括磁电介质、单负材料、单近零材料和双近零（DNZ）材料。结果表明，未涂层的磁电介质球体在E面和H面具有几乎相同的散射强度。进一步观察到，对于一个ε近零（ENZ）球体，E面散射场的强度几乎是各向同性的。对于涂层球体，结果表明，涂有ENZ和μ近零材料的磁电介质球体在向前和向后散射（BS）方向上具有几乎相同的E面散射强度。同样，结果还表明，涂有DNZ层的有限尺寸磁电介质球体在BS方向上可以对入射波隐身。
