基于人工表面等离激元的小型化微波器件研究进展

Recent progresses of miniaturized microwave devices based on spoof surface plasmon polaritons

人工表面等离激元(Spoof Surface Palsmon Polaritons,SSPP)是由入射电磁波与电磁媒质相互作用,导致媒质表面电子发生集体振荡,所产生的一种表面混合电磁模式,具有波动与粒子的双重性质.在空气一侧,SSPP表现出波动的性质,以电磁波的形式沿媒质界面纵向传输,而在界面法向,场以指数函数衰减;在电磁媒质一侧,SSPP表现为群电子振荡的性质,在法向,场依然按照指数函数衰减;并且,群电子振荡的振幅略小于电磁波波动的振幅.因此,SSPP具有诸多奇特的电磁性质,如场局域特性,深亚波长特性,以及非线性频率色散特性,等等,在微波电胳设计、天线设计、隐身材料与隐身结构设计、电子对抗等领域都具有非常重要的应用价值.文章主要综述了SSPP在小型化微波器件方面的研究进展,包括微波集成电路、滤波器、环形器、传感器、天线、涡旋波发生器等等,为小型化微波器件设计与应用提供借鉴.

Spoof surface plasmon polaritons(SSPP)is a hybrid surface electromagnetic(EM)mode.When electromagnetic(EM)waves impinge on an EM media,free electros on the media surface will respond collectively by oscillating in resonance with the incident EM waves.The resonance interaction between the electrons and EM waves contributes to the SSPP and gives it’s a dual nature of wave and particle.On the side of the air,the SSPP propagates along the air-media interface,and the field perpendicular to the interface decays exponentially,behaving the wave nature.On the side of the media,the SSPP behaves the nature of electrons oscillation collectively.Field perpendicular to the interface still decays exponentially.However,amplitude of the oscillating electrons is smaller than that of the EM waves.Therefore,the SSPP has unique properties,such as field enhancement,sub-wavelength,non-linear frequency-dependent dispersion,and so on,promising great values in integrated circuits,antennas design,stealth materials or structures,electronic countermeasure applications,etc.In this paper,the recent progress of SSPP-based miniaturized microwave devices is reviewed,including microwave integrated circuits,filters,circulators,sensors,antennas,and orbital angular momentum(OAM)generators and so on.It provids reference to for the design and application of miniaturized microwave devices.