光谱法研究一种具有渐变折射率的新型等离子体光子晶体

发布时间：2018-06-08 07:19

本文选题：等离子体光子晶体 + 介质阻挡放电　；参考：《发光学报》2017年02期

【摘要】：在双水电极介质阻挡放电装置中,在氩气和空气的混合气体放电过程中通过改变气体压强可以得到一种新型等离子体光子晶体。该光子晶体具有四边形的复杂对称结构,包括晶胞中心处的细等离子体柱、四周的等离子体片、等离子体片交叉点产生的等离子体柱和边缘处的粗等离子柱。运用发射光谱法研究了该等离子体光子晶体不同位置处的等离子体状态,通过测量氩原子696.54 nm(2P2→1S5)发射谱线的展宽对比了电子密度,通过氮分子第二正带系(C3Πu→B3Πg)发射谱线计算了分子振动温度。实验结果证实,不但晶胞中心处的细等离子体柱、四周的等离子体片、等离子体片交叉点产生的等离子体柱和边缘处的粗等离子柱具有不同的等离子体状态,不同位置处的晶胞中心细等离子体柱也具有不同的等离子体状态。电子密度由大到小排列依次为:4个角上的细等离子体柱(A)、靠近4个边的细等离子体柱(B)、靠近中心的细等离子体柱(C)、边缘处的粗等离子体柱(D)、等离子体片交叉点产生的等离子体柱(E)、四周的等离子体片(F)。分子振动温度的变化规律与电子密度相反。由于该晶体结构中A、B、C 3处的折射率均不相同,由内向外呈周期性渐变排列,它们和其他位置处不同的等离子体状态构成了具有渐变折射率的等离子体光子晶体。
[Abstract]:A new type of plasma photonic crystal can be obtained by changing the pressure of the mixture of argon and air in a two-electrode dielectric barrier discharge device. The photonic crystal has a quadrilateral complex symmetric structure, including a fine plasma column at the center of the cell, a plasma sheet around it, a plasma column produced by the cross point of the plasma slice, and a coarse plasma column at the edge. The plasma state at different positions of the plasma photonic crystal has been studied by means of the emission spectroscopy. The electron density has been compared by measuring the broadening of the emission lines of the argon atom 696.54 nm ~ (2) P ~ (2 +) 2 ~ (2 +) ~ (1) S _ (5). The molecular vibration temperature was calculated by the emission line of C _ 3 蟺 u ~ (3) B _ (3) in the second positive band system of nitrogen molecules. The experimental results show that not only the fine plasma column at the center of the cell, the plasma sheet around the cell, the plasma column produced by the cross point of the plasma sheet and the coarse plasma column at the edge have different plasma states. The fine plasma column in the center of the unit cell at different positions also has different plasma states. The order of electron density from large to small is as follows: the fine plasma column on four angles, the fine plasma column near the four sides, the thin plasma column near the center, the coarse plasma column at the edge, and the cross point of the plasma slice. The generated plasma column is Ettrium, and the surrounding plasma sheet is FN. The variation of molecular vibration temperature is contrary to that of electron density. Because the refractive index of Agni BC3 in the crystal structure is different, it is arranged gradually from inside to outside, and they are different from the plasma state at other positions to form the plasma photonic crystal with graded refractive index.
【作者单位】：河北大学物理科学与技术学院;滨州学院航空工程学院;
【基金】：国家自然科学基金(11375051) 河北省教育厅项目(LJRC011) 山东省自然科学基金(ZR2014AQ023)资助项目~~
【分类号】：O734

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