A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range
Abstract Metalens are planar lenses composed of the subwavelength arrays, which have unconventional and versatile functionalities to manipulate the light fields compared with the traditional lens. It is noted that the most metalens are designed in a monochromatic mode in the visible or mid-infrared...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-09-01
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| Series: | Photonic Sensors |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s13320-022-0667-4 |
| _version_ | 1798032338483937280 |
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| author | Ye Yuan Zilong Yan Peifeng Zhang Zhu Chang Fengjiang Peng Ruotong Chen Zhenyuan Yang Shizheng Chen Qing Zhao Xiaoping Huang |
| author_facet | Ye Yuan Zilong Yan Peifeng Zhang Zhu Chang Fengjiang Peng Ruotong Chen Zhenyuan Yang Shizheng Chen Qing Zhao Xiaoping Huang |
| author_sort | Ye Yuan |
| collection | DOAJ |
| description | Abstract Metalens are planar lenses composed of the subwavelength arrays, which have unconventional and versatile functionalities to manipulate the light fields compared with the traditional lens. It is noted that the most metalens are designed in a monochromatic mode in the visible or mid-infrared range (mid-IR), however, the broadband range is needed in many practical applications, such as spectroscopy, sensing, and imaging. Here, we design and demonstrate a broadband achromatic dielectric metalens in the mid-IR range of 4 µm–5 µm for near diffraction-limited (1.0λ) focusing. The broadband achromatic propagation and focusing of the metalens are designed and simulated by constructing and optimizing the phase profile. The Pancharatnam-Berry (P-B) phases of all the elements contribute to the main phase increment of the whole phase profile of the metalens. The additional phase is constructed and optimized by using the random search algorithm to obtain the optimized size of all the elements. The focusing efficiency of the achromatic metalens is also optimized and averaged as the result of phase optimization within a wide band for the building elements, while it is lowered comparing with the regular metalens without broadband achromatic designing. Using this combined designing approach, various flat achromatic devices with the broadband metalens can find a new way for full-color detection and imaging. |
| first_indexed | 2024-04-11T20:11:16Z |
| format | Article |
| id | doaj.art-1cf464d47fa44e67bf5691c05f70087c |
| institution | Directory Open Access Journal |
| issn | 1674-9251 2190-7439 |
| language | English |
| last_indexed | 2024-04-11T20:11:16Z |
| publishDate | 2022-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Photonic Sensors |
| spelling | doaj.art-1cf464d47fa44e67bf5691c05f70087c2022-12-22T04:05:05ZengSpringerOpenPhotonic Sensors1674-92512190-74392022-09-011311910.1007/s13320-022-0667-4A Broadband Achromatic Dielectric Planar Metalens in Mid-IR RangeYe Yuan0Zilong Yan1Peifeng Zhang2Zhu Chang3Fengjiang Peng4Ruotong Chen5Zhenyuan Yang6Shizheng Chen7Qing Zhao8Xiaoping Huang9School of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaSchool of Resources and Environment, University of Electronic Science and Technology of ChinaAbstract Metalens are planar lenses composed of the subwavelength arrays, which have unconventional and versatile functionalities to manipulate the light fields compared with the traditional lens. It is noted that the most metalens are designed in a monochromatic mode in the visible or mid-infrared range (mid-IR), however, the broadband range is needed in many practical applications, such as spectroscopy, sensing, and imaging. Here, we design and demonstrate a broadband achromatic dielectric metalens in the mid-IR range of 4 µm–5 µm for near diffraction-limited (1.0λ) focusing. The broadband achromatic propagation and focusing of the metalens are designed and simulated by constructing and optimizing the phase profile. The Pancharatnam-Berry (P-B) phases of all the elements contribute to the main phase increment of the whole phase profile of the metalens. The additional phase is constructed and optimized by using the random search algorithm to obtain the optimized size of all the elements. The focusing efficiency of the achromatic metalens is also optimized and averaged as the result of phase optimization within a wide band for the building elements, while it is lowered comparing with the regular metalens without broadband achromatic designing. Using this combined designing approach, various flat achromatic devices with the broadband metalens can find a new way for full-color detection and imaging.https://doi.org/10.1007/s13320-022-0667-4Broadbandsachromaticmetalensmid-IR |
| spellingShingle | Ye Yuan Zilong Yan Peifeng Zhang Zhu Chang Fengjiang Peng Ruotong Chen Zhenyuan Yang Shizheng Chen Qing Zhao Xiaoping Huang A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range Photonic Sensors Broadbands achromatic metalens mid-IR |
| title | A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range |
| title_full | A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range |
| title_fullStr | A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range |
| title_full_unstemmed | A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range |
| title_short | A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range |
| title_sort | broadband achromatic dielectric planar metalens in mid ir range |
| topic | Broadbands achromatic metalens mid-IR |
| url | https://doi.org/10.1007/s13320-022-0667-4 |
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