等离子体-光子晶体阵列结构波导模型的电磁特性  

Electromagnetic characteristics of waveguide model of plasma-photon crystal array structure

作　　者：杨雨森 王林 苟德梽 唐正明 Yang Yu-Sen;Wang Lin;Gou De-Zhi;Tang Zheng-Ming(School of Electronic Information Engineering,China West Normal University,Nanchong 637002,China)

机构地区：[1]西华师范大学电子信息工程学院,南充637002

出　　处：《物理学报》2024年第24期167-175,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:62301449,62401478);四川省自然科学基金(批准号:2024NSFSC1411);电磁技术与工程南充市重点实验室(批准号:NCKL202005);西华师范大学校级基本科研业务费基金(批准号:22kE005,23kc003,KCXTD2024-2)资助的课题.

摘　　要：为进一步研究光子晶体对电磁波传输的影响,提出了等离子体光子晶体阵列结构波导模型,以期能够实现对电磁波的传输调控.该模型结构能够在W波段实现多频点高效传输,在缺陷空位中心处加入等离子体柱后能够对电磁波进行限幅.通过改变渐变结构参数、等离子体参数等因素可调控电磁波的传输效果.研究结果表明,电磁波在无等离子体干扰的情况下,能实现85.2,92.1,98.5,102.4,106 GHz等多个频点的高效传输,其传输系数均大于-0.42 dB.构造的渐变结构能够使在谐振频率下缺陷空位周围形成不同的强电场,致使气体击穿产生高浓度微波等离子体,实现对电磁波的反射功率、传输功率和吸收功率的有效调控.此外,改变等离子体柱的尺寸大小,可以进一步调节电磁波在不同频点下的传输特性.该研究能够为高频电磁波的传输与微波器件的设计提供支撑依据.Photonic crystal with periodic dielectric constant distribution has become the focus of theoretical and applied research in recent years because of their bandgap structure similar to the electronic states in semiconductors.It is also a promising method of creating a stable low power microplasma.This research field makes it possible to explore plasma science using microplasmas driven by millimeter wave bands.The dispersive and dissipative properties of plasma make plasma photonic crystals have properties that conventional dielectric photonic crystals do not have.The properties and parameters of plasma photonic crystal can be artificially controlled by changing the parameters of the plasma.To further investigate the influence of photonic crystals on electromagnetic wave transmission,a waveguide model with a plasma photonic crystal array structure is proposed in order to achieve modulation of electromagnetic wave transmission.This proposed model structure can achieve multiple frequency transmission points,making up for the shortcoming of single frequency point transmission in the W-band.Meanwhile,adding a plasma column to the center of defect vacancy in the gradient structure can limit the amplitude of electromagnetic waves and regulate the transmission of electromagnetic waves at different resonant frequencies.The results show that electromagnetic wave can achieve efficient transmission at multiple frequency points such as 85.2,92.1,98.5,102.4,106 GHz without plasma interference,and transmission coefficients are greater than-0.42 dB.The construction of gradient structure can form different strong electric fields around the defect vacancy at the resonance frequency,resulting in gas breakdown and the generation of high-concentration microwave plasma,achieving effective control of the reflected power,transmitted power and absorbed power of electromagnetic wave.When the plasma concentration reaches the plasma frequency equivalent to the incident wave frequency,the electromagnetic wave can be transmitted with less loss

关 键 词：等离子体 电磁波 渐变结构 气体击穿 

分 类 号：O441[理学—电磁学]