Guided modes with imaginary, transverse wave number in a slab waveguide with negative permittivity and permeability

被引:151
|
作者
Wu, BI [1 ]
Grzegorczyk, TM [1 ]
Zhang, Y [1 ]
Kong, JA [1 ]
机构
[1] MIT, Elect Res Lab, Cambridge, MA 02139 USA
关键词
D O I
10.1063/1.1570501
中图分类号
O59 [应用物理学];
学科分类号
摘要
The guidance conditions of modes with both real and imaginary transverse wave numbers inside a dielectric slab with negative permittivity and permeability are solved. We show that for real transverse wave numbers, cutoffs exist for all modes, unlike in conventional media where the first even mode. is always propagating. In addition, we also show that guided modes exist for imaginary transverse wave numbers, with the power concentrated at the interfaces instead of having maxima inside the slab. A graphical method of determining the imaginary transverse wave numbers of the guided modes is introduced which clearly identifies the different conditions of propagation depending on the properties of the slab. In particular, propagation of guided waves inside less dense negative media is shown to be possible. (C) 2003 American Institute of Physics.
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页码:9386 / 9388
页数:3
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