讨论了一维负折射光子晶体对光脉冲传播的影响.通过对光脉冲的透射场强的数值计算发现,频谱处于一维负折射率材料光子晶体禁带中的短脉冲通过光子晶体后基本保持形状不变,而对同样的短脉冲通过传统的一维光子晶体的透射脉冲则出现严重畸变.当考虑负折射率材料的色散时,讨论了位相时间随光脉冲载波频率的变化情况.
The transmission of pulses through photonic crystals containing negative materials is discussed. Through the numerical analysis of the transmitted electric field, it is loud that the propagation of a Gaussian short-pulse with its carrier frequency lying in the band gap of a photonic crystals containing negative index materials through the photonic crystals is basically Gaussian distribution, and for the same of short pulse through the traditional one-dimensional photonic crystals, the transmitted electric field is a distorted spectrum. When the negative-index materials is dispersive, the variance of the phase time versus the carrier frequency of pulse is discussed.