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Chin. Opt. Lett.
 Home  List of Issues    Issue 08 , Vol. 16 , 2018    10.3788/COL201816.081601

Linear polarization conversion of transmitted terahertz wave with double-layer meta-grating surfaces
Han Sun1, Yaxin Zhang1, Kailong Wang1, Yuncheng Zhao1, Wei Kou1, Shixiong Liang2, Jiaguang Han3, and Ziqiang Yang1
1 Terahertz Science Cooperative Innovation Center, [University of Electronic Science and Technology of China], Chengdu 61 0054, China
2 National Key Laboratory of Application Specific Integrated Circuit, [Hebei Semiconductor Research Institute], Shijiazhuang 050051, China
3 Center for Terahertz Waves, College of Precision Instrument and Optoelectronics Engineering, [Tianjin University], Key Laboratory of Optoelectronic Information Technology (Ministry of Education), Tianjin 3 00072, China

Chin. Opt. Lett., 2018, 16(08): pp.081601

Keywords(OCIS Code): 160.3918  050.2230  350.2770  

In this Letter, we demonstrate a linear polarization conversion of transmitted terahertz wave with double-layer meta-grating surfaces, which integrated the frequency selectivity of a split ring resonator metasurface and the polarization selectivity of a metallic grating surface. Since the double-layer can reduce the loss, and the Fabry–Perot like resonant effect between the two layers can improve the conversion efficiency, this converter can rotate the incident y-polarized terahertz wave into an x-polarized transmitted wave with relatively low loss and high efficiency. Experimental results show that an average conversion efficiency exceeding 75% from 0.25 to 0.65 THz with the highest efficiency of 90% at 0.43 THz with only ?2 dB loss has been achieved.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Posted online:2018/7/30

Get Citation: Han Sun, Yaxin Zhang, Kailong Wang, Yuncheng Zhao, Wei Kou, Shixiong Liang, Jiaguang Han, and Ziqiang Yang, "Linear polarization conversion of transmitted terahertz wave with double-layer meta-grating surfaces," Chin. Opt. Lett. 16(08), 081601(2018)

Note: This work was supported by the National Natural Science Foundation of China (Nos. 61531010, 61270011, 91438118, and 61501094) and the National Key Basic Research Program of China (No. 2014CB339806).


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