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

被引：85

作者：

Rao, XS

Ong, CK

机构：

[1] Natl Univ Singapore, Temasek Labs, Singapore 119260, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[3] Natl Univ Singapore, Ctr Superconducting & Magnet Mat, Singapore 117542, Singapore

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 11期

关键词：

SURFACE-POLARITONS;

D O I：

10.1103/PhysRevB.68.113103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We carry out finite-difference time-domain simulations, with a specially designed boundary condition, on pure evanescent waves interacting with a lossy left-handed material (LHM) slab. Our results provide the 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.

引用

页数：4

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