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由电单负材料A和磁单负材料B构成了一维对称型光子晶体,数值计算表明其带隙中出现了一隧穿模.材料层数增加,隧穿模宽度急剧变窄,而其位置不变.隧穿模的位置和宽度对入射角的变化都不太敏感.材料的几何厚度减小,隧穿模的位置蓝移,而其宽度不变.μA,εB增加,隧穿模的位置红移,宽度减小.利用隧穿模的以上特性可以实现对电磁波传播的动态调控.
A one-dimensional symmetric photonic crystal is formed by the electron-negative material A and the magnetic single-negative material B. Numerical calculations show that a tunneling mode appears in the bandgap. The number of layers of the material increases and the width of the tunneling mode sharply narrows. The position and width of the tunneling die are not sensitive to the change of incident angle.The geometric thickness of the material decreases and the position of the tunneling die blue-shifts without changing its width.μA, εB increase, the tunneling mode The position of the redshift, the width decreases.Using the above characteristics of the tunneling mode can achieve the dynamic regulation of electromagnetic wave propagation.