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Chinese Optics Letters, Volume. 16, Issue 8, 081601(2018)

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
Author Affiliations
  • 1Terahertz Science Cooperative Innovation Center, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 2National Key Laboratory of Application Specific Integrated Circuit, Hebei Semiconductor Research Institute, Shijiazhuang 050051, China
  • 3Center for Terahertz Waves, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronic Information Technology (Ministry of Education), Tianjin 300072, China
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    (a) Schematic of the sample used in the experiment. (b) The size parameters of the unit cell. (c) The photos of the manufactured metasurface. (d) The photos of the manufactured grating layer.

    Fig. 1. (a) Schematic of the sample used in the experiment. (b) The size parameters of the unit cell. (c) The photos of the manufactured metasurface. (d) The photos of the manufactured grating layer.

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    (a) TDS experimental test system. (b) Time-domain waveform. (c) The FFT of the time-domain signal of the air sample, the cross-polarization coefficient (Txy), and co-polarization coefficient (Tyy), respectively. (d) Transmittance spectra of simulated results (solid strips) and measured results (dotted strips).

    Fig. 2. (a) TDS experimental test system. (b) Time-domain waveform. (c) The FFT of the time-domain signal of the air sample, the cross-polarization coefficient (Txy), and co-polarization coefficient (Tyy), respectively. (d) Transmittance spectra of simulated results (solid strips) and measured results (dotted strips).

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    (a) Decomposition of the incident electric field vector Ein. (b) The surface current distributions and field contours of modes A and B. (c) The transmission coefficients (S21) of electric fields E1 and E2 and the transmission of Tyy and Txy for just one metasurface layer.

    Fig. 3. (a) Decomposition of the incident electric field vector Ein. (b) The surface current distributions and field contours of modes A and B. (c) The transmission coefficients (S21) of electric fields E1 and E2 and the transmission of Tyy and Txy for just one metasurface layer.

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    (a) Scheme of the Fabry–Perot like resonance in the structure. (b) Cross-polarization conversion coefficients of the double-layer structure. (c) Cross-polarized transmission coefficients with different r.

    Fig. 4. (a) Scheme of the Fabry–Perot like resonance in the structure. (b) Cross-polarization conversion coefficients of the double-layer structure. (c) Cross-polarized transmission coefficients with different r.

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

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    Paper Information

    Category: Materials

    Received: May. 2, 2018

    Accepted: Jun. 13, 2018

    Published Online: Aug. 2, 2018

    The Author Email: Yaxin Zhang (zhangyaxin@uestc.edu.cn), Shixiong Liang (wialliam@163.com)

    DOI:10.3788/COL201816.081601

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology