A Metalens with a Near-Unity Numerical Aperture Article Swipe
YOU?
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· 2018
· Open Access
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· DOI: https://doi.org/10.1021/acs.nanolett.8b00368
The numerical aperture (NA) of a lens determines its ability to focus light and its resolving capability. Having a large NA is a very desirable quality for applications requiring small light-matter interaction volumes or large angular collections. Traditionally, a large NA lens based on light refraction requires precision bulk optics that ends up being expensive and is thus also a specialty item. In contrast, metasurfaces allow the lens designer to circumvent those issues producing high-NA lenses in an ultraflat fashion. However, so far, these have been limited to numerical apertures on the same order of magnitude as traditional optical components, with experimentally reported NA values of <0.9. Here we demonstrate, both numerically and experimentally, a new approach that results in a diffraction-limited flat lens with a near-unity numerical aperture (NA > 0.99) and subwavelength thickness (∼λ/3), operating with unpolarized light at 715 nm. To demonstrate its imaging capability, the designed lens is applied in a confocal configuration to map color centers in subdiffractive diamond nanocrystals. This work, based on diffractive elements that can efficiently bend light at angles as large as 82°, represents a step beyond traditional optical elements and existing flat optics, circumventing the efficiency drop associated with the standard, phase mapping approach.
Related Topics
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1021/acs.nanolett.8b00368
- OA Status
- green
- Cited By
- 488
- References
- 50
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2611865590
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2611865590Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1021/acs.nanolett.8b00368Digital Object Identifier
- Title
-
A Metalens with a Near-Unity Numerical ApertureWork title
- Type
-
articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2018Year of publication
- Publication date
-
2018-02-27Full publication date if available
- Authors
-
Ramón Paniagua‐Domínguez, Yefeng Yu, Egor Khaidarov, Sumin Choi, Victor Leong, Reuben M. Bakker, Xinan Liang, Yuan Hsing Fu, Vytautas Valuckas, Leonid A. Krivitsky, Arseniy I. KuznetsovList of authors in order
- Landing page
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https://doi.org/10.1021/acs.nanolett.8b00368Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://arxiv.org/pdf/1705.00895Direct OA link when available
- Concepts
-
Optics, Numerical aperture, Lens (geology), Aperture (computer memory), Focal length, Diffraction, Physics, Diamond, Angular resolution (graph drawing), Focus (optics), Materials science, Wavelength, Mathematics, Acoustics, Combinatorics, Composite materialTop concepts (fields/topics) attached by OpenAlex
- Cited by
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488Total citation count in OpenAlex
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2025: 65, 2024: 80, 2023: 63, 2022: 58, 2021: 69Per-year citation counts (last 5 years)
- References (count)
-
50Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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| abstract_inverted_index.desirable | 24 |
| abstract_inverted_index.expensive | 54 |
| abstract_inverted_index.magnitude | 95 |
| abstract_inverted_index.numerical | 1, 88, 127 |
| abstract_inverted_index.operating | 136 |
| abstract_inverted_index.precision | 47 |
| abstract_inverted_index.producing | 73 |
| abstract_inverted_index.requiring | 28 |
| abstract_inverted_index.resolving | 15 |
| abstract_inverted_index.specialty | 60 |
| abstract_inverted_index.standard, | 200 |
| abstract_inverted_index.thickness | 134 |
| abstract_inverted_index.ultraflat | 78 |
| abstract_inverted_index.(∼λ/3), | 135 |
| abstract_inverted_index.associated | 197 |
| abstract_inverted_index.circumvent | 70 |
| abstract_inverted_index.determines | 7 |
| abstract_inverted_index.efficiency | 195 |
| abstract_inverted_index.near-unity | 126 |
| abstract_inverted_index.refraction | 45 |
| abstract_inverted_index.represents | 182 |
| abstract_inverted_index.capability, | 147 |
| abstract_inverted_index.capability. | 16 |
| abstract_inverted_index.components, | 99 |
| abstract_inverted_index.demonstrate | 144 |
| abstract_inverted_index.diffractive | 169 |
| abstract_inverted_index.efficiently | 173 |
| abstract_inverted_index.interaction | 31 |
| abstract_inverted_index.numerically | 111 |
| abstract_inverted_index.traditional | 97, 186 |
| abstract_inverted_index.unpolarized | 138 |
| abstract_inverted_index.applications | 27 |
| abstract_inverted_index.collections. | 36 |
| abstract_inverted_index.demonstrate, | 109 |
| abstract_inverted_index.light-matter | 30 |
| abstract_inverted_index.metasurfaces | 64 |
| abstract_inverted_index.circumventing | 193 |
| abstract_inverted_index.configuration | 156 |
| abstract_inverted_index.nanocrystals. | 164 |
| abstract_inverted_index.subwavelength | 133 |
| abstract_inverted_index.Traditionally, | 37 |
| abstract_inverted_index.experimentally | 101 |
| abstract_inverted_index.subdiffractive | 162 |
| abstract_inverted_index.experimentally, | 113 |
| abstract_inverted_index.diffraction-limited | 121 |
| cited_by_percentile_year.max | 100 |
| cited_by_percentile_year.min | 98 |
| corresponding_author_ids | https://openalex.org/A5038308983, https://openalex.org/A5068715461 |
| countries_distinct_count | 1 |
| institutions_distinct_count | 11 |
| corresponding_institution_ids | https://openalex.org/I115228651, https://openalex.org/I144291393 |
| citation_normalized_percentile.value | 0.99741456 |
| citation_normalized_percentile.is_in_top_1_percent | True |
| citation_normalized_percentile.is_in_top_10_percent | True |