Topic
Transformation optics
About: Transformation optics is a(n) research topic. Over the lifetime, 2687 publication(s) have been published within this topic receiving 102378 citation(s).
Papers published on a yearly basis
Papers
More filters
22 May 2012
TL;DR: In this article, the influence of surface roughness on the homogenized anisotropic response of metal-insulator stacks is evaluated and the imaging and antenna opportunities are described for metal insulator stack lenses and analytic models are developed for curved stacks that can be used in design.
Abstract: : Our focus has been on the design and analysis of metamaterials that will lead to the realization of new classes of devices. In large part, the materials are not defined by lithography, and hence are amenable to inexpensive large-scale manufacture. Nonlinear optimization methods have been used to design structures that are based on anisotropic metamaterials and operate as efficient energy collectors (anti-reflection coatings) and cloaks. Active quantum dot metamaterials have yielded controllable transmission windows, and this material forms the basis of a nanophotonic source. A graphene stack is proposed that appears to be the blackest material, and an experimental effort has started with a collaborator. Magnetism based on carbon nanotube coils is providing new insight into magnetic metamaterials. A study of electromagnetic energy in dispersive materials has produced some surprising results. A rigorous study of electromagnetic forces in positive and negative refractive index materials shows that a negative force occurs in a material with gain. Imaging and antenna opportunities are described for metal-insulator stack lenses, and analytic models are developed for curved stacks that can be used in design. The influence of surface roughness on the homogenized anisotropic response of metal-insulator stacks is evaluated.
01 Sep 2013
TL;DR: In this paper, a generalized transverse waveguide analysis for ET and Fishnet Metamaterials (FMs) in realistic metallic screens has been presented, which is valid for lossy metallic screens thanks to the Surface Impedance (SI) approximation.
Abstract: A generalized transverse waveguide analysis for Extraordinary Transmission (ET) and Fishnet Metamaterials (FMs) in realistic metallic screens has recently been published by the authors [1]. The model is valid for lossy metallic screens thanks to the Surface Impedance (SI) approximation (e.g. [2]). A standard scattering matrixes formalism makes the model applicable to stacked screens with possible dielectric boards. A number of reported phenomena [3, 4] related to screens with a periodic array of slits or holes are reproduced efficiently with the presented analysis.