Design of broadband polarization converter for terahertz waves |
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Authors: | PAN Wu SHEN Da-jun and YAN Yan-jun |
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Institution: | 1.College of Photoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing,China |
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Abstract: | A broadband reflective polarization converter is proposed. The unit cell of polarization converter is composed of a single-split resonant ring, a double-split resonant ring, a dielectric substrate and a metallic ground. The simulated results show that the polarization converter can convert x-polarized waves into y-polarized waves and obtain a broadband polarization conversion from 0.501 0 THz to 1.390 0 THz with the polarization conversion ratio (PCR) beyond 80% at normal incidence. Moreover, the surface current distributions are investigated to explain the polarization conversion mechanism. Finally, a good agreement is achieved between simulated and measured results. The polarization converter can be applied in terahertz imaging, communication and stealthy technology. |
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