The negative index of refraction demystified

被引:174
作者
McCall, MW
Lakhtakia, A
Weiglhofer, WS
机构
[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Dept Phys, London SW7 2BW, England
[2] Penn State Univ, Dept Engn Sci & Mech, CATMAS, University Pk, PA 16802 USA
[3] Univ Glasgow, Dept Math, Glasgow G12 8QW, Lanark, Scotland
关键词
D O I
10.1088/0143-0807/23/3/314
中图分类号
G40 [教育学];
学科分类号
040101 ; 120403 ;
摘要
We study electromagnetic wave propagation in media in which the effective relative permittivity and the effective relative permeability are allowed to take any value in the upper half of the complex plane. A general condition is derived for the phase velocity to be oppositely directed to the power flow. That extends the recently studied case of propagation in media for which the relative permittivity and relative permeability are both simultaneously negative, to include dissipation as well. An illustrative case study demonstrates that in general the spectrum divides into five distinct regions.
引用
收藏
页码:353 / 359
页数:7
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