Li Chao, Li Fang
Institute of Electronics, Chinese Academy of Science, BeiJing 100080, PR China.
Opt Express. 2008 Aug 18;16(17):13414-20. doi: 10.1364/oe.16.013414.
Transformation optics opens an exciting gateway to design electromagnetic "invisibility" cloaks with anisotropic and inhomogeneous medium. In this paper, we establish a generalized transformation procedure to highly improve the flexibilities for the design of two-dimensional (2D) cloaks. The general expressions for the complex medium parameters are developed, which can be readily applied to design 2D cloaks with arbitrary geometries. An example of 2D cloak with irregular cross section is designed and studied by full-wave simulations. The Huygens' Principle is applied to quantitatively evaluate its unusual electromagnetic behaviors. All the theoretical and numerical results verify the effectiveness of the proposed approach. The generalization in this Paper makes a great step forward for the flexible design of electromagnetic cloaks with arbitrary shapes.
变换光学为利用各向异性和非均匀介质设计电磁“隐身”斗篷打开了一扇令人兴奋的大门。在本文中，我们建立了一种广义变换方法，以极大地提高二维（2D）斗篷设计的灵活性。推导了复介质参数的一般表达式，该表达式可轻松应用于设计任意几何形状的二维斗篷。通过全波模拟设计并研究了一个具有不规则横截面的二维斗篷实例。应用惠更斯原理定量评估其异常的电磁行为。所有理论和数值结果均验证了所提方法的有效性。本文中的泛化方法为灵活设计任意形状的电磁斗篷迈出了重要一步。
