Flat lens–based subwavelength focusing and scanning enabled by Fourier translation
Abstract: We demonstrate a technique for flexibly controlling subwavelength focusing and scanning, by using the Fourier translation property of a topology-preserved flat lens. The Fourier transform property of the flat lens enables converting an initial phase shift of light into a spatial displacement of its focus. The flat lens used in the technique exhibits a numerical aperture of 0.7, leading to focusing the incident light to a subwavelength scale. Based on the technique, we realize flexible control of the focal positions with arbitrary incident light, including higher-order structured light. Particularly, the presented platform can generate multifocal spots carrying optical angular momentum, with each focal spot independently controlled by the incident phase shift. This technique results in a scanning area of 10 μm × 10 μm, allowing to realize optical scanning imaging with spatial resolution up to 700 nm. This idea is able to achieve even smaller spatial resolution when using higher-numerical-aperture flat lens and can be extended to integrated scenarios with smaller dimension. The presented technique benefits potential applications such as in scanning imaging, optical manipulation, and laser lithography.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Flat lens–based subwavelength focusing and scanning enabled by Fourier translation ; volume:13 ; number:20 ; year:2024 ; pages:3867-3876 ; extent:10
Nanophotonics ; 13, Heft 20 (2024), 3867-3876 (gesamt 10)
- Urheber
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Zhang, Xin
Hu, Yanwen
Lin, Haolin
Yin, Hao
Li, Zhen
Fu, Shenhe
Chen, Zhenqiang
- DOI
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10.1515/nanoph-2024-0206
- URN
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urn:nbn:de:101:1-2409011631485.578822841721
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:24 MESZ
Datenpartner
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Beteiligte
- Zhang, Xin
- Hu, Yanwen
- Lin, Haolin
- Yin, Hao
- Li, Zhen
- Fu, Shenhe
- Chen, Zhenqiang
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