Design method for large-scale wide field-of-view monochromatic metalenses
We propose a novel design method for wide field-of-view monochromatic metalenses. The proposed technique partitions the outer region of a metalens into supercells, which are generated by dividing the outer region into intervals along the radial direction, where the target phase changes by 2π, and al...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2024-01-01
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| Series: | EPJ Applied Metamaterials |
| Subjects: | |
| Online Access: | https://epjam.edp-open.org/articles/epjam/full_html/2024/01/epjam230008/epjam230008.html |
| _version_ | 1827287131829043200 |
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| author | Tahara Hiroyuki Yasui Toshifumi |
| author_facet | Tahara Hiroyuki Yasui Toshifumi |
| author_sort | Tahara Hiroyuki |
| collection | DOAJ |
| description | We propose a novel design method for wide field-of-view monochromatic metalenses. The proposed technique partitions the outer region of a metalens into supercells, which are generated by dividing the outer region into intervals along the radial direction, where the target phase changes by 2π, and along the angular direction with a constant angular periodicity. Therefore, the shape of each supercell can be approximated as a rectangle with its size comparable to a wavelength. The arrangement of pillars within this supercell is determined by metagrating optimization via the adjoint method. The optimization process considers both inter-pillar couplings and the range of incidence angles. This makes the design of large-scale wide field-of-view high-efficiency metalenses more tractable than the conventional unit-cell-based method, which is prone to efficiency decrease especially near the lens periphery. Furthermore, it has a potential advantage in terms of computational cost over other recently proposed optimization-based methods. |
| first_indexed | 2024-04-24T10:52:11Z |
| format | Article |
| id | doaj.art-7ece5b9eaa4341a79f3478bf515b6299 |
| institution | Directory Open Access Journal |
| issn | 2272-2394 |
| language | English |
| last_indexed | 2024-04-24T10:52:11Z |
| publishDate | 2024-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Applied Metamaterials |
| spelling | doaj.art-7ece5b9eaa4341a79f3478bf515b62992024-04-12T07:44:20ZengEDP SciencesEPJ Applied Metamaterials2272-23942024-01-0111810.1051/epjam/2024001epjam230008Design method for large-scale wide field-of-view monochromatic metalensesTahara Hiroyuki0Yasui Toshifumi1Sony Semiconductor Solutions Corporation, Research Division 3Sony Semiconductor Solutions Corporation, Research Division 3We propose a novel design method for wide field-of-view monochromatic metalenses. The proposed technique partitions the outer region of a metalens into supercells, which are generated by dividing the outer region into intervals along the radial direction, where the target phase changes by 2π, and along the angular direction with a constant angular periodicity. Therefore, the shape of each supercell can be approximated as a rectangle with its size comparable to a wavelength. The arrangement of pillars within this supercell is determined by metagrating optimization via the adjoint method. The optimization process considers both inter-pillar couplings and the range of incidence angles. This makes the design of large-scale wide field-of-view high-efficiency metalenses more tractable than the conventional unit-cell-based method, which is prone to efficiency decrease especially near the lens periphery. Furthermore, it has a potential advantage in terms of computational cost over other recently proposed optimization-based methods.https://epjam.edp-open.org/articles/epjam/full_html/2024/01/epjam230008/epjam230008.htmlmetasurfacemetalensmetagrating |
| spellingShingle | Tahara Hiroyuki Yasui Toshifumi Design method for large-scale wide field-of-view monochromatic metalenses EPJ Applied Metamaterials metasurface metalens metagrating |
| title | Design method for large-scale wide field-of-view monochromatic metalenses |
| title_full | Design method for large-scale wide field-of-view monochromatic metalenses |
| title_fullStr | Design method for large-scale wide field-of-view monochromatic metalenses |
| title_full_unstemmed | Design method for large-scale wide field-of-view monochromatic metalenses |
| title_short | Design method for large-scale wide field-of-view monochromatic metalenses |
| title_sort | design method for large scale wide field of view monochromatic metalenses |
| topic | metasurface metalens metagrating |
| url | https://epjam.edp-open.org/articles/epjam/full_html/2024/01/epjam230008/epjam230008.html |
| work_keys_str_mv | AT taharahiroyuki designmethodforlargescalewidefieldofviewmonochromaticmetalenses AT yasuitoshifumi designmethodforlargescalewidefieldofviewmonochromaticmetalenses |