Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses
Optical systems with wide field-of-views (FOV) are crucial for many applications such as high performance imaging, optical projection, augmented/virtual reality, and miniaturized medical imaging tools. Typically, aberration-free imaging with a wide FOV is achieved by stacking multiple refractive len...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | EPJ Applied Metamaterials |
| Subjects: | |
| Online Access: | https://epjam.edp-open.org/articles/epjam/full_html/2022/01/epjam210028/epjam210028.html |
| _version_ | 1811308834205990912 |
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| author | Shastri Kunal Monticone Francesco |
| author_facet | Shastri Kunal Monticone Francesco |
| author_sort | Shastri Kunal |
| collection | DOAJ |
| description | Optical systems with wide field-of-views (FOV) are crucial for many applications such as high performance imaging, optical projection, augmented/virtual reality, and miniaturized medical imaging tools. Typically, aberration-free imaging with a wide FOV is achieved by stacking multiple refractive lenses (as in a “fisheye” lens), adding to the size and weight of the optical system. Single metalenses designed to have a wide FOV have the potential to replace these bulky imaging systems and, moreover, they may be dispersion engineered for spectrally broadband operation. In this paper, we derive a fundamental bound on the spectral bandwidth of dispersion-engineered wide-FOV achromatic metalenses. We show that for metalenses with a relatively large numerical aperture (NA), there is a tradeoff between the maximum achievable bandwidth and the FOV; interestingly, however, the bandwidth reduction saturates beyond a certain FOV that depends on the NA of the metalens. These findings may provide important information and insights for the design of future wide-FOV achromatic flat lenses. |
| first_indexed | 2024-04-13T09:31:14Z |
| format | Article |
| id | doaj.art-8be015d7f6e945479a7e8e3a15bedfc6 |
| institution | Directory Open Access Journal |
| issn | 2272-2394 |
| language | English |
| last_indexed | 2024-04-13T09:31:14Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Applied Metamaterials |
| spelling | doaj.art-8be015d7f6e945479a7e8e3a15bedfc62022-12-22T02:52:15ZengEDP SciencesEPJ Applied Metamaterials2272-23942022-01-0191610.1051/epjam/2022012epjam210028Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalensesShastri Kunal0https://orcid.org/0000-0001-6928-2753Monticone Francesco1https://orcid.org/0000-0003-0457-1807School of Electrical and Computer Engineering, Cornell UniversitySchool of Electrical and Computer Engineering, Cornell UniversityOptical systems with wide field-of-views (FOV) are crucial for many applications such as high performance imaging, optical projection, augmented/virtual reality, and miniaturized medical imaging tools. Typically, aberration-free imaging with a wide FOV is achieved by stacking multiple refractive lenses (as in a “fisheye” lens), adding to the size and weight of the optical system. Single metalenses designed to have a wide FOV have the potential to replace these bulky imaging systems and, moreover, they may be dispersion engineered for spectrally broadband operation. In this paper, we derive a fundamental bound on the spectral bandwidth of dispersion-engineered wide-FOV achromatic metalenses. We show that for metalenses with a relatively large numerical aperture (NA), there is a tradeoff between the maximum achievable bandwidth and the FOV; interestingly, however, the bandwidth reduction saturates beyond a certain FOV that depends on the NA of the metalens. These findings may provide important information and insights for the design of future wide-FOV achromatic flat lenses.https://epjam.edp-open.org/articles/epjam/full_html/2022/01/epjam210028/epjam210028.htmlmetalensmeta-opticsmetasurfacedispersion engineering |
| spellingShingle | Shastri Kunal Monticone Francesco Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses EPJ Applied Metamaterials metalens meta-optics metasurface dispersion engineering |
| title | Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses |
| title_full | Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses |
| title_fullStr | Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses |
| title_full_unstemmed | Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses |
| title_short | Bandwidth bounds for wide-field-of-view dispersion-engineered achromatic metalenses |
| title_sort | bandwidth bounds for wide field of view dispersion engineered achromatic metalenses |
| topic | metalens meta-optics metasurface dispersion engineering |
| url | https://epjam.edp-open.org/articles/epjam/full_html/2022/01/epjam210028/epjam210028.html |
| work_keys_str_mv | AT shastrikunal bandwidthboundsforwidefieldofviewdispersionengineeredachromaticmetalenses AT monticonefrancesco bandwidthboundsforwidefieldofviewdispersionengineeredachromaticmetalenses |