介质阻挡放电不同填充比环形等离子体光子晶体  

Annular Plasma Photonic Crystals with Different Filling Ratios in Dielectric Barrier Discharge

作　　者：刘怡宁 范伟丽[1] 侯笑含 吴志成 贺亚峰[1] 刘富成[1] Liu Yining;Fan Weili;Hou Xiaohan;Wu Zhicheng;He Yafeng;Liu Fucheng(College of Physics Science and Technology,Hebei University,Baoding 071002,Hebei,China)

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《激光与光电子学进展》2022年第13期359-366,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11875014,11975089);河北省自然科学基金(A2021201010,A2021201003,A2017201099)。

摘　　要：采用液体电极介质阻挡放电装置,对不同填充比环形等离子体光子晶体(APPCs)进行了系统研究。实现了等离子体柱半径动态可调、时空高度对称的APPCs,并能有效调控其基元微结构。基于实验结果,利用二维有限元计算,研究了不同APPCs的色散关系,分析了等离子体柱半径对能带位置和带隙宽度的影响。结果表明,随等离子体柱半径增大,能带结构由不完全带隙转化为完全带隙,带隙宽度随之增大。环形结构基元的设计使等离子体光子晶体(PPCs)具有易于实现宽带隙能带结构的优异特性,其形成完全带隙的等离子体柱半径阈值显著低于常规PPCs。在相同等离子体柱半径下,APPCs的带隙宽度明显大于常规PPCs。提出的等离子体填充比可调的APPCs,为能带结构的优化设计提供了更多可能,同时为设计新型可调谐光子晶体以及开发宽带隙、高度集成光子器件带来启示。Herein,we present a systematic study on annular plasma photonic crystals(APPCs)with different filling ratios in dielectric barrier discharge using the water electrodes.In this study,the APPCs with dynamically adjustable plasma columns and high spatiotemporal symmetry have been realized,providing possibilities for modulating the microstructures of elements in APPCs.Based on the experimental results,the dispersion relation of different APPCs are studied using the finite element method.Furthermore,the influences of the radius of plasma columns on the positions and sizes of band gaps are analyzed.The results show that band gaps change from unidirectional to omnidirectional with increasing plasma column radius and the widths of omnidirectional band gaps increase considerably.Compared with conventional plasma photonic crystals(PPCs),APPCs can easily produce large omnidirectional band gaps with lower threshold values of the plasma column radius.Additionally,for a given radius,the sizes of band gaps in APPCs are larger than those in conventional PPCs.The novel APPCs with tunable filling ratios proposed here provide more possibilities for engineering the band gaps and offer enlightenment for designing new types of tunable photonic crystals and developing wide band gaps,highly-integrated photonic devices.

关 键 词：光学器件 介质阻挡放电 环形等离子体光子晶体 能带结构 填充比 

分 类 号：O531[理学—等离子体物理] O539[理学—物理]