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

Abstract

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.

arXiv comment4 pages, 2 figures

References in corpus (3)

• Limitations on Sub-Diffraction Imaging with a Negative Refractive Index Slab
• Universal Features of the Time Evolution of Evanescent Modes in a Left-Handed Perfect Lens
• Some Problems with Negative Refraction

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