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Realization of band-pass and low-pass filters on a single chip in terahertz regime
Authors:WANG Lei  GENG Zhao-xin  HE Xun-jun  CAO Ya-peng  YANG Yu-ping and CHEN Hong-da
Affiliation:1. School of Applied Sciences, Harbin University of Science and Technology, Harbin, 150080, China
2. School of Information Engineering, Minzu University of China, Beijing, 100081, China
3. Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
Abstract:In this paper, we present the design, simulation, fabrication and characterization of a terahertz (THz) filter based on metamaterial consisting of the periodical double symmetric splits ring resonator (DS-SRR) array. We can observe that the metamaterial-based filter possesses a band-pass transmission when the electrical field is along y direction, and it possesses a low-pass transmission when the electrical field is along x direction. Our results demonstrate that the proposed filter can realize the switching between band-pass effect and low-pass effect by only changing the polarization direction of the incident electromagnetic wave. Moreover, the calculated surface current distributions are also used to analyze the switchable mechanism of the THz metamatrial filter. Therefore, the proposed THz wave filter has a potential application in THz wave communication systems.
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