一种用于定向发射的超材料。

A metamaterial for directive emission.

作者信息

Enoch Stefan, Tayeb Gérard, Sabouroux Pierre, Guérin Nicolas, Vincent Patrick

机构信息

Institut Fresnel, Faculté des Sciences et Techniques de St. Jérôme, case 161, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France.

出版信息

Phys Rev Lett. 2002 Nov 18;89(21):213902. doi: 10.1103/PhysRevLett.89.213902. Epub 2002 Nov 4.

DOI:10.1103/PhysRevLett.89.213902

PMID:12443413

Abstract

In this paper we present the first results on emission in metamaterial. We show how the specific properties of metallic composite material can modify the emission of an embedded source. We show that under proper conditions the energy radiated by a source embedded in a slab of metamaterial will be concentrated in a narrow cone in the surrounding media. An experimental demonstration of this effect is given in the microwave domain, and the constructed antenna has a directivity equivalent to the best reported results with photonic-crystal-based antennas but using a completely different physical principle [B. Temelkuaran, J. Appl. Phys. 87, 603 (2000)]].

摘要

在本文中，我们展示了超材料中发射的首批结果。我们展示了金属复合材料的特定属性如何改变嵌入源的发射。我们表明，在适当条件下，嵌入超材料平板中的源所辐射的能量将集中在周围介质中的一个窄锥内。在微波领域给出了这种效应的实验演示，并且所构建的天线具有与基于光子晶体的天线所报道的最佳结果相当的方向性，但使用的是完全不同的物理原理[B. 特梅尔库阿兰，《应用物理杂志》87, 603 (2000)]。