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根据微波传输线理论,结合集总元件构造的复合左/右手传输线,分别实现了负介电常数材料和负磁导率材料,并进一步制作了由这两种单负材料交替组成的一维光子晶体。仿真与测量结果显示,该光子晶体结构可产生零有效相位带隙。若结构参数能同时满足阻抗匹配条件和相位匹配条件,零有效相位带隙将消失。若两个匹配条件无法同时被满足,零有效相位带隙将始终存在,带隙中心处在阻抗匹配频率。此外,在阻抗匹配频率处,若结构参数偏离相位匹配条件越大,零有效相位带隙将越宽且越深,通过此规律可实现对带隙的调制。
According to the microwave transmission line theory, combined with the left / right hand transmission line constructed by the lumped elements, the negative dielectric constant material and the negative magnetic permeability material were respectively realized, and the one-dimensional photonic crystal composed of the two single negative materials was further fabricated . Simulation and measurement results show that the photonic crystal structure can produce zero effective phase bandgap. If the structural parameters can meet the impedance matching conditions and phase matching conditions, the zero effective phase bandgap will disappear. If two matching conditions can not be met at the same time, the zero effective phase bandgap will always exist and the bandgap center will be at the impedance matching frequency. In addition, at the impedance matching frequency, if the structural parameters deviate from the phase matching condition, the bandgap of the zero effective phase will be wider and deeper, and the modulation of the bandgap can be realized by this law.