Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture
The resolving power of metalens telescopes rely on their aperture size. Flat telescopes are advancing with the research on super-resolution confocal metalenses with large aperture. However, the aperture sizes of metalenses are usually bound within hundreds of micrometers due to computational and fab...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-03-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/14/6/513 |
| _version_ | 1797239794779029504 |
|---|---|
| author | Cheng Guo Zhishuai Zheng Ziang Liu Zilong Yan Yucheng Wang Ruotong Chen Zhuonan Liu Peiquan Yu Weihao Wan Qing Zhao Xiaoping Huang |
| author_facet | Cheng Guo Zhishuai Zheng Ziang Liu Zilong Yan Yucheng Wang Ruotong Chen Zhuonan Liu Peiquan Yu Weihao Wan Qing Zhao Xiaoping Huang |
| author_sort | Cheng Guo |
| collection | DOAJ |
| description | The resolving power of metalens telescopes rely on their aperture size. Flat telescopes are advancing with the research on super-resolution confocal metalenses with large aperture. However, the aperture sizes of metalenses are usually bound within hundreds of micrometers due to computational and fabrication challenges, limiting their usage on practical optical devices like telescopes. In this work, we demonstrated a two-step designing method for the design of dual-band far-field super-resolution metalens with aperture sizes from the micro-scale to macro-scale. By utilizing two types of inserted unit cells, the phase profile of a dual-wavelength metalens with a small aperture of 100 μm was constructed. Through numerical simulation, the measured FWHM values of the focal spots of 5.81 μm and 6.81 μm at working wavelengths of 632.8 nm and 1265.6 nm were found to all be slightly smaller than the values of 0.61 λ/NA, demonstrating the super-resolution imaging of the designed metalens. By measuring the optical power ratio of the focal plane and the incident plane, the focusing efficiencies were 76% at 632.8 nm and 64% at 1265.6 nm. Based on the design method for small-aperture metalens, far-field imaging properties through the macro metalens with an aperture of 40 mm were simulated by using the Huygens–Fresnel principle. The simulation results demonstrate confocal far-field imaging behavior at the target wavelengths of 632.8 nm and 1265.6 nm, with a focal length of 200 mm. The design method for dual-band far-field super-resolution metalens with a large aperture opens a door towards the practical applications in the dual-band space telescope system. |
| first_indexed | 2024-04-24T17:57:12Z |
| format | Article |
| id | doaj.art-65a4c13d5b6d459cb9400fbcbae61ae2 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-24T17:57:12Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-65a4c13d5b6d459cb9400fbcbae61ae22024-03-27T13:57:34ZengMDPI AGNanomaterials2079-49912024-03-0114651310.3390/nano14060513Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large ApertureCheng Guo0Zhishuai Zheng1Ziang Liu2Zilong Yan3Yucheng Wang4Ruotong Chen5Zhuonan Liu6Peiquan Yu7Weihao Wan8Qing Zhao9Xiaoping Huang10School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, ChinaThe resolving power of metalens telescopes rely on their aperture size. Flat telescopes are advancing with the research on super-resolution confocal metalenses with large aperture. However, the aperture sizes of metalenses are usually bound within hundreds of micrometers due to computational and fabrication challenges, limiting their usage on practical optical devices like telescopes. In this work, we demonstrated a two-step designing method for the design of dual-band far-field super-resolution metalens with aperture sizes from the micro-scale to macro-scale. By utilizing two types of inserted unit cells, the phase profile of a dual-wavelength metalens with a small aperture of 100 μm was constructed. Through numerical simulation, the measured FWHM values of the focal spots of 5.81 μm and 6.81 μm at working wavelengths of 632.8 nm and 1265.6 nm were found to all be slightly smaller than the values of 0.61 λ/NA, demonstrating the super-resolution imaging of the designed metalens. By measuring the optical power ratio of the focal plane and the incident plane, the focusing efficiencies were 76% at 632.8 nm and 64% at 1265.6 nm. Based on the design method for small-aperture metalens, far-field imaging properties through the macro metalens with an aperture of 40 mm were simulated by using the Huygens–Fresnel principle. The simulation results demonstrate confocal far-field imaging behavior at the target wavelengths of 632.8 nm and 1265.6 nm, with a focal length of 200 mm. The design method for dual-band far-field super-resolution metalens with a large aperture opens a door towards the practical applications in the dual-band space telescope system.https://www.mdpi.com/2079-4991/14/6/513dual bandsuper-resolution metalenslarge aperturefar-field imaging |
| spellingShingle | Cheng Guo Zhishuai Zheng Ziang Liu Zilong Yan Yucheng Wang Ruotong Chen Zhuonan Liu Peiquan Yu Weihao Wan Qing Zhao Xiaoping Huang Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture Nanomaterials dual band super-resolution metalens large aperture far-field imaging |
| title | Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture |
| title_full | Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture |
| title_fullStr | Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture |
| title_full_unstemmed | Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture |
| title_short | Design and Analysis of the Dual-Band Far-Field Super-Resolution Metalens with Large Aperture |
| title_sort | design and analysis of the dual band far field super resolution metalens with large aperture |
| topic | dual band super-resolution metalens large aperture far-field imaging |
| url | https://www.mdpi.com/2079-4991/14/6/513 |
| work_keys_str_mv | AT chengguo designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT zhishuaizheng designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT ziangliu designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT zilongyan designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT yuchengwang designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT ruotongchen designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT zhuonanliu designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT peiquanyu designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT weihaowan designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT qingzhao designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture AT xiaopinghuang designandanalysisofthedualbandfarfieldsuperresolutionmetalenswithlargeaperture |