Research On The Electromagnetic Characteristics Of One-Dimensional Plasma And Its Photonic Crystals

Plasma is macroscopically a neutral ionization gas, which is composed of cations, free elections and neutral atoms. Its movement primarily controlled by electromagnetic force exhibits remarkable collective action. The research on the interaction of electromagnetic wave with plasma and plasma photonic crystals, which is array composed of alternating thin plasma and dielectric material, may be have a practical value about plasma stealth, plasma antenna, plasma lens and microwave filters. One-dimensional plasma and its photonic crystals is the focus of this thesis. Based on FDTD (Finite-Difference Time-Domain) and TMM (Transfer Matrix Method), we discussed the electromagnetic characteristics of plasma and its periodic structure. According to the results of numerical calculation, we acquired main results including:●The peculiarity of some FDTD methods for homogeneous unmagnetized plasma are introduced, including Z-transform(ZT) method, auxiliary differential equation(ADE) method, shift operator(SO) method and current density convolution(JEC) method. At different frequency, these methods calculated electromagnetic field in homogeneous unmagnetized plasma, which also have been compared in precision and efficiency.●We investigate computationally the reflection, absorption, and transmission of EM-waves at an arbitrary angle of incidence by a inhomogeneous magnetized plasma slab.●Transfer Matrix Method was used to study the dispersion relation of one-dimensional plasma photonic crystals at an arbitrary angle of incidence. We studied the affection to the curves of dispersion relation by related parameters and the characters of band gaps.●The anomalous dispersion and superluminal negative group velocity in one-dimensional plasma photonic crystals were discovered. We also discussed characters of cut-off frequency, which we explained by energy band theory.