Dynamically reconfigurable high-efficiency terahertz metasurface holograms
A reflective, dynamically reconfigurable, high-efficiency metasurface holographic scheme is presented in this paper, which is realized by pumping thin gallium arsenide wafers with a structured femtosecond laser. When the terahertz (THz) passes through the gallium arsenide wafer (GaAs), the pattern c...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2021-01-01
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| Series: | EPJ Applied Metamaterials |
| Subjects: | |
| Online Access: | https://epjam.edp-open.org/articles/epjam/full_html/2021/01/epjam200023/epjam200023.html |
| _version_ | 1818971043635658752 |
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| author | Hu Mengyuan Tian Zhen |
| author_facet | Hu Mengyuan Tian Zhen |
| author_sort | Hu Mengyuan |
| collection | DOAJ |
| description | A reflective, dynamically reconfigurable, high-efficiency metasurface holographic scheme is presented in this paper, which is realized by pumping thin gallium arsenide wafers with a structured femtosecond laser. When the terahertz (THz) passes through the gallium arsenide wafer (GaAs), the pattern carried by the pump light is converted into the complex permittivity of the light carrier density distribution on the gallium arsenide wafer, which modulates the wafer, thereby changing the transmittance of the THz wave. The wavefront of the THz beam is determined by changing the shape and direction of the projected resonator on the DMD by Pancharatnam-Berry (P-B) phase principle. The numerical simulation results show that different holograms can be obtained by dynamically switching the projection on the DMD, and the orthogonal conversion efficiency of circularly polarized light can reach 90%. The holographic scheme proposed in this paper is convenient and fast and may advance the real-time dynamic conversion and dynamic display of holograms. |
| first_indexed | 2024-12-20T14:46:06Z |
| format | Article |
| id | doaj.art-ce232f9d4a2d4a2b8579a9bf7caf75ab |
| institution | Directory Open Access Journal |
| issn | 2272-2394 |
| language | English |
| last_indexed | 2024-12-20T14:46:06Z |
| publishDate | 2021-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Applied Metamaterials |
| spelling | doaj.art-ce232f9d4a2d4a2b8579a9bf7caf75ab2022-12-21T19:37:07ZengEDP SciencesEPJ Applied Metamaterials2272-23942021-01-018210.1051/epjam/2020012epjam200023Dynamically reconfigurable high-efficiency terahertz metasurface hologramsHu Mengyuan0Tian Zhen1https://orcid.org/0000-0002-2861-4325Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University and the Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University and the Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)A reflective, dynamically reconfigurable, high-efficiency metasurface holographic scheme is presented in this paper, which is realized by pumping thin gallium arsenide wafers with a structured femtosecond laser. When the terahertz (THz) passes through the gallium arsenide wafer (GaAs), the pattern carried by the pump light is converted into the complex permittivity of the light carrier density distribution on the gallium arsenide wafer, which modulates the wafer, thereby changing the transmittance of the THz wave. The wavefront of the THz beam is determined by changing the shape and direction of the projected resonator on the DMD by Pancharatnam-Berry (P-B) phase principle. The numerical simulation results show that different holograms can be obtained by dynamically switching the projection on the DMD, and the orthogonal conversion efficiency of circularly polarized light can reach 90%. The holographic scheme proposed in this paper is convenient and fast and may advance the real-time dynamic conversion and dynamic display of holograms.https://epjam.edp-open.org/articles/epjam/full_html/2021/01/epjam200023/epjam200023.htmlterahertzmetasurfacehologramsp-b phase |
| spellingShingle | Hu Mengyuan Tian Zhen Dynamically reconfigurable high-efficiency terahertz metasurface holograms EPJ Applied Metamaterials terahertz metasurface holograms p-b phase |
| title | Dynamically reconfigurable high-efficiency terahertz metasurface holograms |
| title_full | Dynamically reconfigurable high-efficiency terahertz metasurface holograms |
| title_fullStr | Dynamically reconfigurable high-efficiency terahertz metasurface holograms |
| title_full_unstemmed | Dynamically reconfigurable high-efficiency terahertz metasurface holograms |
| title_short | Dynamically reconfigurable high-efficiency terahertz metasurface holograms |
| title_sort | dynamically reconfigurable high efficiency terahertz metasurface holograms |
| topic | terahertz metasurface holograms p-b phase |
| url | https://epjam.edp-open.org/articles/epjam/full_html/2021/01/epjam200023/epjam200023.html |
| work_keys_str_mv | AT humengyuan dynamicallyreconfigurablehighefficiencyterahertzmetasurfaceholograms AT tianzhen dynamicallyreconfigurablehighefficiencyterahertzmetasurfaceholograms |