Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface
Dynamic manipulation of terahertz (THz) beams plays an important role in THz application systems. The PB metasurface provides an effective scheme for space separation and deflection of the spin beam. However, mirror symmetry locking of the conjugated spin states severely limits the versatility of th...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2023-09-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2023-0468 |
| _version_ | 1797653355233804288 |
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| author | Zhao Huijun Liu Jiayue Jiang Songlin Jiang Xinhao Cheng Jierong Ji Yunyun Chang Shengjiang Fan Fei |
| author_facet | Zhao Huijun Liu Jiayue Jiang Songlin Jiang Xinhao Cheng Jierong Ji Yunyun Chang Shengjiang Fan Fei |
| author_sort | Zhao Huijun |
| collection | DOAJ |
| description | Dynamic manipulation of terahertz (THz) beams plays an important role in THz application systems. The PB metasurface provides an effective scheme for space separation and deflection of the spin beam. However, mirror symmetry locking of the conjugated spin states severely limits the versatility of the device. In this work, we demonstrate a liquid crystal (LC) cascaded bilayer metasurface that includes an LC layer, anisotropic metasurface, and PB metasurface. By controlling anisotropy and polarization conversion effects, dynamic spin asymmetric transmission is realized. Meanwhile, two different dynamic energy distribution processes are realized between the L and R state with the corresponding deflection side. The results show that the device achieves a large angular spatial dispersion within the frequency-angle scanning range of ±35° to ±75° corresponding to the broadband range of 0.6–1.1 THz. Moreover, it achieves a spin beam spatial separation with a maximum proportion of energy distribution greater than 26 dB, and the active modulation rate in the energy distribution process reaches 98 %. This work provides a dynamic THz spin conversion and efficient large-angle beam scanning, with important potentials in wavelength/polarization division multiplexing and frequency-scanning antenna for large-capacity THz wireless communication, radar, and imaging systems. |
| first_indexed | 2024-03-11T16:43:26Z |
| format | Article |
| id | doaj.art-89a53ba63645488ca8ad9ae9d7bff904 |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-03-11T16:43:26Z |
| publishDate | 2023-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-89a53ba63645488ca8ad9ae9d7bff9042023-10-23T07:50:46ZengDe GruyterNanophotonics2192-86142023-09-0112203945395410.1515/nanoph-2023-0468Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurfaceZhao Huijun0Liu Jiayue1Jiang Songlin2Jiang Xinhao3Cheng Jierong4Ji Yunyun5Chang Shengjiang6Fan Fei7Institute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaInstitute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaInstitute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaInstitute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaInstitute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaInstitute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaTianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin300350, ChinaInstitute of Modern Optics, Nankai University, Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Tianjin300350, ChinaDynamic manipulation of terahertz (THz) beams plays an important role in THz application systems. The PB metasurface provides an effective scheme for space separation and deflection of the spin beam. However, mirror symmetry locking of the conjugated spin states severely limits the versatility of the device. In this work, we demonstrate a liquid crystal (LC) cascaded bilayer metasurface that includes an LC layer, anisotropic metasurface, and PB metasurface. By controlling anisotropy and polarization conversion effects, dynamic spin asymmetric transmission is realized. Meanwhile, two different dynamic energy distribution processes are realized between the L and R state with the corresponding deflection side. The results show that the device achieves a large angular spatial dispersion within the frequency-angle scanning range of ±35° to ±75° corresponding to the broadband range of 0.6–1.1 THz. Moreover, it achieves a spin beam spatial separation with a maximum proportion of energy distribution greater than 26 dB, and the active modulation rate in the energy distribution process reaches 98 %. This work provides a dynamic THz spin conversion and efficient large-angle beam scanning, with important potentials in wavelength/polarization division multiplexing and frequency-scanning antenna for large-capacity THz wireless communication, radar, and imaging systems.https://doi.org/10.1515/nanoph-2023-0468terahertzmetasurfacebeam scanningliquid crystalspin |
| spellingShingle | Zhao Huijun Liu Jiayue Jiang Songlin Jiang Xinhao Cheng Jierong Ji Yunyun Chang Shengjiang Fan Fei Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface Nanophotonics terahertz metasurface beam scanning liquid crystal spin |
| title | Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface |
| title_full | Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface |
| title_fullStr | Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface |
| title_full_unstemmed | Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface |
| title_short | Broadband large-angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface |
| title_sort | broadband large angle beam scanning with dynamic spin energy distribution based on liquid crystal cascaded bilayer metasurface |
| topic | terahertz metasurface beam scanning liquid crystal spin |
| url | https://doi.org/10.1515/nanoph-2023-0468 |
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