中文摘要：

采用等温近似，用非磁化等离子体的分段线形电流密度卷积（PiecewiseLinear Current Density Recursive Convolution，PLCDRC）时域有限差分（Finite—Different Time—Domain，FDTD）算法研究一维时变非磁化等离子体光子晶体禁带的密度和温度特性。以高斯脉冲为激励源，用算法公式得到的电磁波透射率来讨论等离子体温度和密度对时变非磁化等离子体光子晶体禁带的影响。结果表明，改变等离子体的温度、密度和等离子体的上升时间，可以获得不同的禁带特性。

英文摘要：

The piecewise linear current density recursive convolution （PLCDRC） finite -different time -domain （FDTD） method for unmagnetized plasmas is applied to study on the temperature and density properties of prohibit band gaps for one dimension time - varying unmagnetized plasma photonic crystals under the isothermal hypothesis. The electromagnetic propagation process of a Gaussian pulse through a time - varying unmagnetized plasma photonic crystal is investigated. The transmission coefficients through time - varying unmagnetized plasma photonic crystals are calculated,the effects of plasma temperature and density on characteristic of prohibit band gaps for time - varying unmagnetized plasma photonic crystals is analyzed with them. The results illustrate that the different prohibit band gaps can be gotten by changing plasma temperature, density and rising time