Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry
Optical metasurfaces have great potential to overcome the functional limitations of conventional optical devices. In addition to polarization- or wavelength-multiplexed metasurfaces, angle-multiplexed metasurfaces can provide new degrees of freedom, enabling previously unrealized complex functionali...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-02-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/nanoph-2022-0793 |
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| _version_ | 1832570445900021760 |
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| author | Kim Nayoung Kim Myungjoon Jung Joonkyo Chang Taeyong Jeon Suwan Shin Jonghwa |
| author_facet | Kim Nayoung Kim Myungjoon Jung Joonkyo Chang Taeyong Jeon Suwan Shin Jonghwa |
| author_sort | Kim Nayoung |
| collection | DOAJ |
| description | Optical metasurfaces have great potential to overcome the functional limitations of conventional optical devices. In addition to polarization- or wavelength-multiplexed metasurfaces, angle-multiplexed metasurfaces can provide new degrees of freedom, enabling previously unrealized complex functionality in diverse applications such as LiDAR, augmented reality glasses, and imaging. However, there have been fundamental trade-offs in transmission efficiency and angular sensitivity for practically important paraxial rays. In this paper, we overcome this limitation by breaking mirror symmetries of single-layer metasurface structures. Based on an effective medium theory, we intuitively explain which material parameters affect the sensitivity and efficiency and prove that high sensitivity and high efficiency can be achieved simultaneously by breaking the mirror symmetry. Based on this, we propose optimized metasurfaces for two applications: an angle-multiplexed beam-steering device with up to 93% relative efficiency and an angle-multiplexed metalens array that can break the fundamental resolution–density trade-off of microlens arrays with high efficiency. The proposed angle-selective designs could pave the way for the development of new classes of compact optical devices with novel functions. |
| format | Article |
| id | doaj-art-915adba1a6034a6aa2272dea31091876 |
| institution | Kabale University |
| issn | 2192-8614 |
| language | English |
| publishDate | 2023-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-915adba1a6034a6aa2272dea310918762025-02-02T15:46:12ZengDe GruyterNanophotonics2192-86142023-02-0112132347235810.1515/nanoph-2022-0793Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetryKim Nayoung0Kim Myungjoon1Jung Joonkyo2Chang Taeyong3Jeon Suwan4Shin Jonghwa5Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon34141, Republic of KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon34141, Republic of KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon34141, Republic of KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon34141, Republic of KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon34141, Republic of KoreaDepartment of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon34141, Republic of KoreaOptical metasurfaces have great potential to overcome the functional limitations of conventional optical devices. In addition to polarization- or wavelength-multiplexed metasurfaces, angle-multiplexed metasurfaces can provide new degrees of freedom, enabling previously unrealized complex functionality in diverse applications such as LiDAR, augmented reality glasses, and imaging. However, there have been fundamental trade-offs in transmission efficiency and angular sensitivity for practically important paraxial rays. In this paper, we overcome this limitation by breaking mirror symmetries of single-layer metasurface structures. Based on an effective medium theory, we intuitively explain which material parameters affect the sensitivity and efficiency and prove that high sensitivity and high efficiency can be achieved simultaneously by breaking the mirror symmetry. Based on this, we propose optimized metasurfaces for two applications: an angle-multiplexed beam-steering device with up to 93% relative efficiency and an angle-multiplexed metalens array that can break the fundamental resolution–density trade-off of microlens arrays with high efficiency. The proposed angle-selective designs could pave the way for the development of new classes of compact optical devices with novel functions.https://doi.org/10.1515/nanoph-2022-0793angle-multiplexedbeam deflectionbroken symmetryeffective mediuminverse designmetalens |
| spellingShingle | Kim Nayoung Kim Myungjoon Jung Joonkyo Chang Taeyong Jeon Suwan Shin Jonghwa Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry Nanophotonics angle-multiplexed beam deflection broken symmetry effective medium inverse design metalens |
| title | Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry |
| title_full | Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry |
| title_fullStr | Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry |
| title_full_unstemmed | Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry |
| title_short | Highly angle-sensitive and efficient optical metasurfaces with broken mirror symmetry |
| title_sort | highly angle sensitive and efficient optical metasurfaces with broken mirror symmetry |
| topic | angle-multiplexed beam deflection broken symmetry effective medium inverse design metalens |
| url | https://doi.org/10.1515/nanoph-2022-0793 |
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