Planar metamaterials: beyond negative index

Fedotov, V.A. and Zheludev, N.I. (2008) Planar metamaterials: beyond negative index. 4th National Workshop on Metamaterials and Special Materials for Electromagnetic Applications and TLC (MMSM'08), Naples, Italy. 18 - 19 Dec 2008.

Abstract

We will give a brief overview of our recent and ongoing research on a novel class of electromagnetic metamaterials exhibiting narrow high-Q resonances [1]. We will also introduce a concept of "incoherent" and "coherent" metamaterials [2], where narrow resonances are formed by correspondingly individual meta-molecules and collective coherent response of the entire ordered array of meta-molecules. We will draw parallels between the classical electromagnetic response of such metamaterials and well-established quantum effects such as electromagnetically induced transparency [3] and Mossbauer effect, and notice some remarkable similarity with a ferromagnetic phase transition in a two-dimensional Ising spin lattice. Several intriguing applications of this new class of artificial media will be discussed, in particular achieving considerable delays in propagation of electromagnetic pulses and building of a coherent source of electromagnetic radiation fuelled by plasmonic oscillations - the lasing spaser [4].

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Contributors

Author: N.I. Zheludev

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