Research On The Interaction Between Electromagnetic Wave And Plasma

Analytical method and numerical method are both included in the study of the interaction between plasma and electromagnetic wave. The time-domain finite-difference method is a simple and effective numerical method which has been widely used to simulate the electromagnetic wave propagation in various dispersive media. The characteristic of plasma and the application in plasma stealth technique are introduced. Four numerical methods are presented, including piecewise linear recursive convolution (PLRC) method, piecewise linear current density recursive convolution (PLCDRC) method, shift operator (SO) method and Runge-Kutta exponential time differencing (RKETD) method. Compared with exact solution, the correctness and efficiency of the four methods are verified by calculating the reflection and transmission coefficients for a non-magnetized collisional plasma slab in one dimension. The four methods are applied to simulate the electromagnetic wave propagation in one dimensional models and two dimensional models.The Plasma Photonic Crystals (PPCs) are artificially periodic array composed of alternating the plasmas and dielectric materials. RKETD-FDTD method is applied to study the one dimensional non-magnetized plasma photonic crystals. The effect of different plasma parameters and defect structures on photonic band gap is discussed in detail. The effect of different plasma parameters on photonic band gap of the magnetized plasma photonic crystals are also discussed by using SO-FDTD method.The reflection, absorption and transmission powers of electromagnetic wave in homogeneous non-magnetized plasma and inhomogeneous magnetized plasma are calculated in this paper. The effects of various plasma parameters, different electromagnetic wave frequency, different values of magnetic field intensity and different plasma slab thickness on the reflected and absorbed powers are discussed. The results illustrate that the factors have great influence on reflection and absorption of electromagnetic wave in plasma. According to the results, adjusting the above-mentioned parameters can realize the goal of maximizing the ability of plasma absorbing or reflecting wave.