Kotyński Rafał, Antosiewicz Tomasz J, Król Karol, Panajotov Krassimir
Faculty of Physics, University of Warsaw, Pasteura 7, 02-093 Warsaw, Poland.
J Opt Soc Am A Opt Image Sci Vis. 2011 Feb 1;28(2):111-7. doi: 10.1364/JOSAA.28.000111.
We describe the change of the spatial distribution of the state of polarization occurring during two-dimensional (2D) imaging through a multilayer and in particular through a layered metallic flat lens. Linear or circular polarization of incident light is not preserved due to the difference in the amplitude transfer functions for the TM and TE polarizations. In effect, the transfer function and the point spread function (PSF) that characterize 2D imaging through a multilayer both have a matrix form, and cross-polarization coupling is observed for spatially modulated beams with a linear or circular incident polarization. The PSF in a matrix form is used to characterize the resolution of the superlens for different polarization states. We demonstrate how the 2D PSF may be used to design a simple diffractive nanoelement consisting of two radial slits. The structure assures the separation of nondiffracting radial beams originating from two slits in the mask and exhibits an interesting property of a backward power flow in between the two rings.
我们描述了在通过多层介质，特别是通过分层金属平板透镜进行二维（2D）成像过程中发生的偏振态空间分布变化。由于TM和TE偏振的振幅传递函数不同，入射光的线性或圆偏振无法保持。实际上，表征通过多层介质进行2D成像的传递函数和点扩散函数（PSF）都具有矩阵形式，并且对于具有线性或圆入射偏振的空间调制光束，会观察到交叉偏振耦合。以矩阵形式表示的PSF用于表征超透镜在不同偏振态下的分辨率。我们展示了如何使用二维PSF来设计一个由两个径向狭缝组成的简单衍射纳米元件。该结构确保了掩模中两个狭缝产生的非衍射径向光束的分离，并在两个环之间表现出向后功率流的有趣特性。
