Amplification of evanescent waves in a lossy left-handed material slab

Details Amplification of evanescent waves in a lossy left-handed material slab Amplification of evanescent waves in a lossy left-handed material slab

2003-04-06

arxiv.org/abs/cond-mat/0304133v2

Physical Review B 68, 113103 (2003)

Physics

Condensed Matter

Materials Science

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.68.113103

We carry out finite-difference time-domain (FDTD) simulations, with a specially-designed boundary condition, on pure evanescent waves interacting with a lossy left-handed material (LHM) slab. Our results provide the first full-wave numerical evidence for the amplification of evanescent waves inside a LHM slab of finite absorption. The amplification is due to the interactions between the evanescent waves and the coupled surface polaritons at the two surfaces of the LHM slab and the physical process can be described by a simple model.

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