Linear polarization conversion of transmitted terahertz wave with double-layer meta-grating surfaces

Han Sun; Yaxin Zhang; Kailong Wang; Yuncheng Zhao; Wei Kou; Shixiong Liang; Jiaguang Han; Ziqiang Yang

doi:10.3788/COL201816.081601

Journals >Chinese Optics Letters >Volume 16 >Issue 8 >Page 081601 > Article

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

Linear polarization conversion of transmitted terahertz wave with double-layer meta-grating surfaces

Han Sun¹, Yaxin Zhang^1、*, Kailong Wang¹, Yuncheng Zhao¹, Wei Kou¹, Shixiong Liang^2、**, 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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DOI: 10.3788/COL201816.081601 Cite this Article Set citation alerts

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[J]. Chinese Optics Letters, 2018, 16(8): 081601 Copy Citation Text

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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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Fig. 3. (a) Decomposition of the incident electric field vector E_in. (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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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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