For different values of the effective refractive index, the air-guided modes can exist in different forms in part of PBGs.

依据有效折射率的不同，部分带隙中的空气-导模将以不同的形式存在。

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We investigate guided modes in the asymmetric waveguide structure with a left-handed material (LHM) layer surrounded by air and metal.

本文调查左手材料作为导波层、空气和金属作为包覆层的不对称左手材料波导的导模特性。

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