Issue
EPL
Volume 87, Number 3, August 2009
Article Number 34005
Number of page(s) 4
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/87/34005
Published online 28 August 2009
EPL, 87 (2009) 34005
DOI: 10.1209/0295-5075/87/34005

Wave energy amplification in a metamaterial-based traveling-wave structure

Y. S. Tan and R. Seviour

Department of Physics, Lancaster University - Lancaster, LA1 4YB UK, EU

seviour@unix.lancs.ac.uk

received 26 May 2009; accepted in final form 25 July 2009; published August 2009
published online 28 August 2009

Abstract
We consider the interaction between a particle beam and a propagating electromagnetic wave in the presence of a metamaterial. We show that the introduction of a metamaterial gives rise to a novel dispersion curve which determines a unique wave particle relationship, via the frequency dependence of the metamaterial and the novel ability of metamaterials to exhibit simultaneous negative permittivity and permeability. Using a modified form of Madey's theorem we find that the novel dispersion of the metamaterial leads to an amplification of the EM wave power.

PACS
41.20.Jb - Electromagnetic wave propagation; radiowave propagation.
07.57.Hm - Infrared, submillimeter wave, microwave, and radiowave sources.
07.57.-c - Infrared, submillimeter wave, microwave and radiowave instruments and equipment.

© EPLA 2009