Photonic bands in two-dimensional microplasma arrays. II. Band gaps observed in millimeter and subterahertz ranges
Photonic bands in two-dimensional microplasma arrays. II. Band gaps observed in millimeter and subterahertz ranges
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DOI：
10.1063/1.2713940
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发表时间：
2007-04-01
影响因子：
3.2
通讯作者：
Tachibana, Kunihide
中科院分区：
文献类型：
--
作者：
Sakaguchi, Takui;Sakai, Osamu;Tachibana, Kunihide
在二维微等离子体阵列中观察到了等离子体光子带隙，并通过实验和理论研究对其性质进行了表征。微等离子体柱点燃在氦气近大气压形成的晶格常数为1.5至2.5毫米的正方形晶格的晶体状结构。在毫米范围内的微波传输通过阵列区域衰减的光子带隙的频率在伽玛-X方向，如预测的修改后的平面波展开法。在电磁波传播的数值分析中阐明了带隙附近的频率依赖性，并与实验结果一致。微等离子体中的电子密度估计为1 × 10（13）cm（-3），来自带隙处的衰减率。晶格常数的变化引起的频率移动的带隙在毫米和亚太赫兹的区域，所以等离子体光子晶体可以作为一个动态可控的带阻滤波器。(c)2007年，美国物理学会。
Plasma photonic band gaps have been observed in a two-dimensional microplasma array, and we have characterized their properties by both experimental and theoretical results. Microplasma columns ignited in helium near atmospheric pressure formed crystal-like structures in a square lattice with a lattice constant from 1.5 to 2.5 mm. Microwaves in the millimeter range transmitting through the array region attenuated at frequencies of photonic band gap in the Gamma-X direction, as predicted by the modified plane-wave expansion method. Frequency dependence around the band gap was clarified in the numerical analysis of electromagnetic wave propagation and agreed with experimental results. Electron density in microplasmas was estimated to be 1x10(13) cm(-3) from the attenuation rate at the band gap in the Gamma-X direction. Variation of the lattice constant induced frequency shift of the band gap in the millimeter and subterahertz regions, and so plasma photonic crystal can perform as a dynamically controllable band-stop filter. (c) 2007 American Institute of Physics.