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11 August 2011 Terahertz wide band-pass filter design based on double layer metal hole arrays
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This paper illustrates the fundamental transmission characteristics of periodic air hole metal array utilizing FDTD simulations. A metal-dielectric structure with periodic hole arrays perforated in the metal layer is presented. By changing the values of parameters, such as dielectric constant, thickness of the metal film and hole periodicity, the transmission responses are explored at terahertz regime. The surface plasmon polaritons play a significant role in the transmission. Based on the analysis, a wide band-pass filter containing metal-dielectric-metal layers is designed with square lattices of air holes in metal layers. The parameters of the structures are carefully selected to give a filtering characteristic with relatively wide and flat pass-band exceeding 200 GHz, over 95% THz transmittance and easy manufacture process. This kind of sample structure can be the potential candidate of filters in terahertz systems.
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Song Xia, Dongxiao Yang, Lei Rao, and Tao Li "Terahertz wide band-pass filter design based on double layer metal hole arrays", Proc. SPIE 8195, International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications, 81951N (11 August 2011);

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