中国物理B ›› 2006, Vol. 15 ›› Issue (8): 1772-1776.doi: 10.1088/1009-1963/15/8/023

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

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

董正高, 祝世宁, 刘　辉   

  1. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • 收稿日期:2005-11-08 修回日期:2006-04-23 出版日期:2006-08-20 发布日期:2006-08-20
  • 基金资助:
    Project supported by the State Key Program for Basic Research of China (Grant No 2004CB619003), and by the National Natural Science Foundation of China (Grant No 90201008).

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

Dong Zheng-Gao(董正高), Zhu Shi-Ning(祝世宁)†, and Liu Hui(刘辉)   

  1. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2005-11-08 Revised:2006-04-23 Online:2006-08-20 Published:2006-08-20
  • Supported by:
    Project supported by the State Key Program for Basic Research of China (Grant No 2004CB619003), and by the National Natural Science Foundation of China (Grant No 90201008).

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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.

Abstract: 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.

Key words: negative refraction, left-handed metamaterial, surface wave

中图分类号:  (Composite materials)

  • 78.66.Sq
78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 78.20.Bh (Theory, models, and numerical simulation)