High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves
The recently developed achromatic metalenses have exhibited a significant potential to replace the conventional bulky lenses. However, the numerical aperture (NA) of current broadband achromatic metalenses (BAMs) operated in long-wavelength infrared (LWIR) range is still insufficient for the applica...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Results in Physics |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723001018 |
| _version_ | 1797870627834560512 |
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| author | Lv-Rong Zhao Xiao-Qiang Jiang Cheng-Xi Li Shao-Xiang Gong Wei-Xing Yu |
| author_facet | Lv-Rong Zhao Xiao-Qiang Jiang Cheng-Xi Li Shao-Xiang Gong Wei-Xing Yu |
| author_sort | Lv-Rong Zhao |
| collection | DOAJ |
| description | The recently developed achromatic metalenses have exhibited a significant potential to replace the conventional bulky lenses. However, the numerical aperture (NA) of current broadband achromatic metalenses (BAMs) operated in long-wavelength infrared (LWIR) range is still insufficient for the applications of microscopy or high-resolution imaging. To address the restriction, a BAM with high NA for sub-diffraction focusing in LWIR waves is proposed. Specifically, the multipole decomposition is performed to avoid the undesirable resonances in the operation wavelength from 9 to 11 μm, which ensures the great linearity of the phase profiles from meta-atoms. After elaborately arranging the meta-atoms to compose a high-NA BAM, numerical results demonstrate that the chromatic aberration is well corrected in the operation wavelength and the maximum deviation is only 3.95%. Moreover, the actual NA of proposed BAM reaches up to 0.79 and the transverse sizes of focal spots are beyond the Abbe diffraction limit. The results indicate that the proposed high-NA BAM may have promising potential in the broadband applications of high-resolution imaging and microscopy. |
| first_indexed | 2024-04-10T00:30:23Z |
| format | Article |
| id | doaj.art-ef6eaa32e55b42e5b2d93861e0ae01c1 |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-04-10T00:30:23Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-ef6eaa32e55b42e5b2d93861e0ae01c12023-03-15T04:27:54ZengElsevierResults in Physics2211-37972023-03-0146106308High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared wavesLv-Rong Zhao0Xiao-Qiang Jiang1Cheng-Xi Li2Shao-Xiang Gong3Wei-Xing Yu4Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, People’s Republic of China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKey Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, People’s Republic of ChinaKey Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, People’s Republic of ChinaKey Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, People’s Republic of China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; Corresponding author at: Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, People’s Republic of China.The recently developed achromatic metalenses have exhibited a significant potential to replace the conventional bulky lenses. However, the numerical aperture (NA) of current broadband achromatic metalenses (BAMs) operated in long-wavelength infrared (LWIR) range is still insufficient for the applications of microscopy or high-resolution imaging. To address the restriction, a BAM with high NA for sub-diffraction focusing in LWIR waves is proposed. Specifically, the multipole decomposition is performed to avoid the undesirable resonances in the operation wavelength from 9 to 11 μm, which ensures the great linearity of the phase profiles from meta-atoms. After elaborately arranging the meta-atoms to compose a high-NA BAM, numerical results demonstrate that the chromatic aberration is well corrected in the operation wavelength and the maximum deviation is only 3.95%. Moreover, the actual NA of proposed BAM reaches up to 0.79 and the transverse sizes of focal spots are beyond the Abbe diffraction limit. The results indicate that the proposed high-NA BAM may have promising potential in the broadband applications of high-resolution imaging and microscopy.http://www.sciencedirect.com/science/article/pii/S2211379723001018 |
| spellingShingle | Lv-Rong Zhao Xiao-Qiang Jiang Cheng-Xi Li Shao-Xiang Gong Wei-Xing Yu High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves Results in Physics |
| title | High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves |
| title_full | High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves |
| title_fullStr | High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves |
| title_full_unstemmed | High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves |
| title_short | High-NA and broadband achromatic metalens for sub-diffraction focusing of long-wavelength infrared waves |
| title_sort | high na and broadband achromatic metalens for sub diffraction focusing of long wavelength infrared waves |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723001018 |
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