Topic
Transformation optics
About: Transformation optics is a research topic. Over the lifetime, 2687 publications have been published within this topic receiving 102378 citations.
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TL;DR: The general strategy based on TO is reviewed to design plasmonic devices capable of harvesting light over a broadband spectrum and achieving considerable field confinement and enhancement.
Abstract: Transformation optics (TO) is a new tool for controlling electromagnetic fields. In the context of metamaterial technology, it provides a direct link between a desired electromagnetic (EM) phenomenon and the material response required for its occurrence. Recently, this powerful framework has been successfully exploited to study surface plasmon assisted phenomena such as light harvesting. Here, we review the general strategy based on TO to design plasmonic devices capable of harvesting light over a broadband spectrum and achieving considerable field confinement and enhancement. The methodology starts with two-dimensional (2D) cases, such as 2D metal edges, crescent-shaped cylinders, nanowire dimers, and rough metal surfaces, and has been well extended to fully-fledged three-dimensional (3D) situations. The largely analytic approach gives physical insights into the processes involved and suggests the way forward to study a wide variety of plasmonic nanostructures.
30 citations
TL;DR: An approach to design an invisible cloak with controlled constitutive parameters and arbitrary shaped boundaries is presented and the analytical solution of a regular cloak and the numerical solution of an irregular cloak verify that the method will guide electromagnetic wave efficiently and control the constitutive parameter of the cloak conveniently.
Abstract: In a recent paper, Chen et al. [Opt. Express 17, 3581 (2009)] develop an approach to design invisible cloaks with controllable constitutive parameters by adjusting the constant k in the Helmholtz’s equation. In this comment, we discuss the limitation of the free parameter k in designing cloaks. It is found that the real constant k can be chosen only as limited values in order to avoid the singular material parameters.
30 citations
01 May 2011
TL;DR: In this article, a dipole in close proximity to a hyperbolic metamaterial is theoretically investigated, and it is found that homogenized effective medium overestimates the Purcell factor compared to real metal-dielectric subwavelength multilayers.
Abstract: Radiation rate of a dipole in close proximity to a hyperbolic metamaterial is theoretically investigated. Homogenized effective medium is found to overestimate the Purcell factor compared to real metal-dielectric subwavelength multilayers.
30 citations
TL;DR: In this article, a proof-of-principle numerical implementation of computer-generated holograms at visible wavelengths that are based on fishnet metamaterials is presented.
Abstract: The dispersive properties of plasmonic metamaterials and the ability to tailor their complex transmission strongly suggest their use in versatile optical elements Here we introduce the idea of such an application in diffractive elements and describe, as a proof-of-principle, two numerical implementations of computer-generated holograms at visible wavelengths that are based on fishnet metamaterials These holograms consist of large arrays of metamaterial unit cells which have locally varying geometrical parameters into which the desired far-field optical response is encoded We describe the entire design process for such holograms, discuss their efficiency and critically assess their limitations
30 citations
TL;DR: In this article, exact electromagnetic solitary pulses were obtained within nonlinear left-handed metamaterials and the effect of pulse decoherence on the modulation instability of partially incoherent electromagnetic waves was investigated.
30 citations