Broadband perfect Littrow diffraction metasurface under large-angle incidence
Littrow diffraction devices are commonly used in the laser field (e.g., laser resonators and spectrometers), where system integration requires larger incidence angles and perfect broadband efficiency. Compared to traditional diffraction devices, which struggle to manipulate light paths under large-a...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-02-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2024-0622 |
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| author | Zhu Jingyuan Zhou Siliang He Tao Feng Chao Wang Zhanshan Dong Siyu Cheng Xinbin |
| author_facet | Zhu Jingyuan Zhou Siliang He Tao Feng Chao Wang Zhanshan Dong Siyu Cheng Xinbin |
| author_sort | Zhu Jingyuan |
| collection | DOAJ |
| description | Littrow diffraction devices are commonly used in the laser field (e.g., laser resonators and spectrometers), where system integration requires larger incidence angles and perfect broadband efficiency. Compared to traditional diffraction devices, which struggle to manipulate light paths under large-angle incidence, metasurfaces has the potential to enhance the broadband efficiency. Despite quasi three-dimensional metasurfaces effects, only perfect anomalous reflection under normal incidence at limited wavelengths was achieved due to energy flow mismatch in the broadband Littrow configuration. Here, we propose a supercell metasurface capable of regulating broadband non-local responses. The metasurface effectively suppresses non-local responses under Littrow mounting, while providing sufficient non-local responses through strong structural coupling effects when the incidence deviates from the Littrow mounting. A large-angle broadband Littrow diffraction metasurface in the mid-infrared spectrum (3.11 µm ∼ 3.52 µm) has been successfully realized, with 99 % efficiency at Littrow angle of 70°. Our results break through the bandwidth limitations of perfect diffraction, providing robust support for the practical applications of metasurfaces in Littrow diffraction devices. |
| format | Article |
| id | doaj-art-ddaf6b322a964f23b503f0713569c8fa |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-ddaf6b322a964f23b503f0713569c8fa2025-08-20T03:53:41ZengDe GruyterNanophotonics2192-86142025-02-011481221122910.1515/nanoph-2024-0622Broadband perfect Littrow diffraction metasurface under large-angle incidenceZhu Jingyuan0Zhou Siliang1He Tao2Feng Chao3Wang Zhanshan4Dong Siyu5Cheng Xinbin6Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaInstitute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai200092, ChinaLittrow diffraction devices are commonly used in the laser field (e.g., laser resonators and spectrometers), where system integration requires larger incidence angles and perfect broadband efficiency. Compared to traditional diffraction devices, which struggle to manipulate light paths under large-angle incidence, metasurfaces has the potential to enhance the broadband efficiency. Despite quasi three-dimensional metasurfaces effects, only perfect anomalous reflection under normal incidence at limited wavelengths was achieved due to energy flow mismatch in the broadband Littrow configuration. Here, we propose a supercell metasurface capable of regulating broadband non-local responses. The metasurface effectively suppresses non-local responses under Littrow mounting, while providing sufficient non-local responses through strong structural coupling effects when the incidence deviates from the Littrow mounting. A large-angle broadband Littrow diffraction metasurface in the mid-infrared spectrum (3.11 µm ∼ 3.52 µm) has been successfully realized, with 99 % efficiency at Littrow angle of 70°. Our results break through the bandwidth limitations of perfect diffraction, providing robust support for the practical applications of metasurfaces in Littrow diffraction devices.https://doi.org/10.1515/nanoph-2024-0622large-anglelittrow-mountingnon-local metasurfacebroadband diffraction |
| spellingShingle | Zhu Jingyuan Zhou Siliang He Tao Feng Chao Wang Zhanshan Dong Siyu Cheng Xinbin Broadband perfect Littrow diffraction metasurface under large-angle incidence Nanophotonics large-angle littrow-mounting non-local metasurface broadband diffraction |
| title | Broadband perfect Littrow diffraction metasurface under large-angle incidence |
| title_full | Broadband perfect Littrow diffraction metasurface under large-angle incidence |
| title_fullStr | Broadband perfect Littrow diffraction metasurface under large-angle incidence |
| title_full_unstemmed | Broadband perfect Littrow diffraction metasurface under large-angle incidence |
| title_short | Broadband perfect Littrow diffraction metasurface under large-angle incidence |
| title_sort | broadband perfect littrow diffraction metasurface under large angle incidence |
| topic | large-angle littrow-mounting non-local metasurface broadband diffraction |
| url | https://doi.org/10.1515/nanoph-2024-0622 |
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