Numerical simulations of negative-index refraction in a lamellar composite with alternating single negative layers

• 来源期刊: 中国物理（英文版）
• 关键词: negative refraction left-handed metamaterial surface wave
• 年，卷（期）: 2006,（8）
• 页码范围: 1772-1776
• 页数: 5页
• 语种: 英文

摘要

Negative-index refraction is demonstrated in a lamellar composite with epsilon-negative (ENG) and mu-negative (MNG) materials stacked alternatively. Based on the effective medium approximation, simultaneously negative effective permittivity and permeability of such a lamellar composite are obtained theoretically and further proven by full-wave simulations. Consequently, the renowned left-handed metamaterial comprising split ring resonators and wires is interpreted as an analogy of such ENG-MNG layers. In addition, beyond the effective medium approximation, the propagating field squeezed near the ENG/MNG interface is demonstrated to be left-handed surface waves with backward phase velocity.