介质阻挡放电中一维等离子体光子晶体及其带隙特性

在双水电极大气压氩气介质阻挡放电中获得了一维可调等离子体光子晶体.通过类似于量子力学Kronig-Penney模型求解周期势的方法,求解Maxwell方程得到了一维等离子光子晶体的色散关系.结合实验数据,理论模拟了晶格常数、等离子体与介质的厚度比、电子密度等不同参数对等离子体光子晶体带隙的影响.结果表明:等离子体光子晶体晶格常数的增大导致能级位置降低,相速度减小;在相同的晶格常数下,等离子体填充比增大时,带隙位置将略有上升且光子带隙数目增加;当电子密度大于1020 m-3时,等离子体光子晶体具有显著禁带宽度.

One-dimensional plasma photonic crystals in dielectric barrier discharge and its photonic bandgaps

A tunable one-dimensional plasma photonic crystal has been obtained in argon dielectric barrier discharge with two water electrodes at atmospheric pressure.The dispersion relation of the plasma photonic crystals is studied by solving a stationary Maxwell wave equation with a method analogous to Kronig-Penney’s problem in quantum mechanics.Based on the experimental data,the influence of the parameters including the lattice constant,the length ratio of the plasma and dielectric and electron density on the band diagrams of the plasma photonic crystals is discussed.Results show that the position of the photonic bands is lowered and the phase velocity is reduced when the lattice constant is increased.For the same lattice constants,larger ratio of the plasma with the dielectric leads to the increase of the band gaps and higher band frequencies.The plasma photonic crystals will show wide band gaps when the electron density is larger than 1020 m-3.