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类表面等离子体激元是光波段表面等离子体激元在低频段的拓展。它利用周期性亚波长结构将低频电磁波紧紧地束缚在金属表面,类表面等离子体激元理论用于指导各种新型有源和无源器件的设计。基于类表面等离子体激元的相关性质,本文设计了一种新型的低通滤波器结构模型,结合数值仿真方法,对模型进行了验证。结果表明,在低频部分,信号能够从输入的传输到输出端;但在高频部分,信号从输入端传到输出端会受到限制,因此该模型结构具有低通滤波器的作用,可以应用于实际应用中。
The plasmon-like surface is an extension of the plasmons in the optical band at low frequencies. It uses periodic subwavelength structure to tightly bind low frequency electromagnetic waves to the metal surface. The surface plasmon theory is used to guide the design of various new types of active and passive devices. Based on the related properties of SPF, a new type of low-pass filter structural model is designed, and the model is verified by numerical simulation. The results show that the signal can be transmitted from the input to the output in the low frequency part, but the signal is limited from the input to the output in the high frequency part. Therefore, the model structure has a low-pass filter and can be applied to Practical applications.