含单缺陷层的一维可调谐磁化等离子体光子晶体滤波特性研究

采用在等温近似的条件下,以等离子体的上升时间、温度和密度为可调谐参量,用磁化等离子体的分段线形电流密度卷积时域有限差分算法研究了含单一缺陷层的一维磁化等离子体光子晶体的滤波特性.以高斯脉冲为激励源,用算法公式得到的电磁波透射系数来讨论了等离子体上升时间、温度、等离子体层密度对其滤波特性的影响.结果表明,改变等离子体上升时间和等离子体层密度可以实现对滤波通道的调整.谐振频率不能通过改变温度进行调整.

Filtering Properties of One Dimensional Tunable Magnetized Plasma Photonic Crystals with Single Defective Layer

The plasma rising time,plasma temperature and plasma density are taken as the tunable parameters,under the isothermal hypothesis. The piecewise linear current density recursive convolution finite-difference time-domain method for magnetized plasma is applied to study the filtering properties of one dimensional tunable magnetized plasma photonic crystals with single defective layer. The electro-magnetic propagation process of a Gaussian pulse through a magnetized plasma photonic crystal is investigated. The transmission coefficients through magnetized plasma photonic crystals are calculated based on which the effects of the plasma rising time,plasma temperature and plasma density on characteristic of filtering are analyzed. The results illustrate that the filter channel can be tuned by changing rising time and plasma density and the resonant frequency can not be tuned by changing plasma temperature.