Compton散射对磁化等离子体光子晶体色散特性的影响

Influence of Compton scattering on dispersion properties in magnetized-plasma photonic crystals

利用多光子非线性Compton散射模型和有限时域差分法,对Compton散射对磁化等离子体光子晶体色散特性的影响进行了理论分析和数值模拟,提出了将入射光和Compton散射光作为磁化等离子体光子晶体中产生色散的新机制。研究结果表明,与Compton散射前相比,Compton散射使零色散频率和截止频率增大,零色散线相对于平带有一定的偏离,截止频率点色散线位置上升,上、下色散曲线分别呈现更加明显的非线性增加和减小的趋势。背景的相对介电函数增加到一定值时,散射使出现的全方向带隙的归一化频率增大,带隙中心位置下降较快,带隙宽度增加较大,波矢偏离周期平面较明显,本征模的截止频率较大,理论计算和数值模拟吻合得很好。

Using multiphoton nonlinear Compton scattering model and finitedifference timedomain method, the influence of Compton scattering on the dispersion properties in magnetizedplasma photonic crystals is studied by way of theoretically analytical and numerical simulation methods. A new dispersion mechanism produced by incident light and Compton scatter in the magnetizedplasma photonie crystals has been pointed out. The results show that the zero dispersion frequency and the cutoff frequency increase with Compton scattering and there exists a difference between the zero dispersion curve and the flat band. The nonlinearity of the first dispersion curve has a remarkable increase and the nonlinearity of the last dispersion curve decreases obviously. When the relative dielectric constant in the background increases to a certain value, the Compton scattering makes the central place of the band gap decreased and makes the band gap width increased. The theoretical analysis and numerical simulation conform to each other well.