Striped superlattice pattern in dielectric barrier discharge
Jianyu Feng, Yuyang Pan, Caixia Li, Binbin Liu, Lifang Dong
Abstract
We report on the striped superlattice pattern in dielectric barrier discharge for the first time. The spatiotemporal structure of the striped superlattice pattern is investigated by a high-speed framing camera. The result shows that the striped superlattice pattern consists of three different transient sub-lattices which are striped-dots, stripes, and small-dots surrounding a striped-dot, respectively. Images of a single frame indicate that the stripes which look like they are diffused are actually made up of individual filaments. The optical emission spectra of different sub-lattices are collected and investigated; it is found that plasma parameters of the three different transient sub-lattices are different. The formation mechanism of the striped superlattice pattern is discussed. And a tunable plasma photonic crystal with one and two-dimensions structures which has the dynamic controllability based on the striped superlattice pattern is present.