Rotational varifocal moiré metalens made of single-crystal silicon meta-atoms for visible wavelengths
Abstract: Metasurface lenses (metalenses) offer an ultrathin and simple optical system with dynamic functions that include focal length tuning. In this study, a rotational varifocal (i.e., moiré) metalens based on octagonal single-crystal silicon pillars was designed and fabricated to realize a high transmittance, whole 2π phase coverage, and polarization insensitivity for visible wavelengths. The moiré metalens consists of a pair of cascaded metasurface-based phase lattices and the focal length can be adjusted from negative to positive by mutual rotation. The fabricated moiré metalens demonstrated a focal length that can be tuned from −36 mm to −2 mm and from 2 to 12 mm by mutual rotation from −90° to 90°, and the experimental measurements agreed well with theoretical values at the design wavelength of 633 nm. Imaging was demonstrated at three distinct wavelengths of 633, 532, and 440 nm.
- 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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Rotational varifocal moiré metalens made of single-crystal silicon meta-atoms for visible wavelengths ; volume:11 ; number:9 ; year:2022 ; pages:1941-1948 ; extent:8
Nanophotonics ; 11, Heft 9 (2022), 1941-1948 (gesamt 8)
- Urheber
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Ogawa, Chikara
Nakamura, Sotaro
Aso, Takumi
Ikezawa, Satoshi
Iwami, Kentaro
- DOI
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10.1515/nanoph-2021-0690
- URN
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urn:nbn:de:101:1-2022120813302259579266
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:36 MESZ
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Beteiligte
- Ogawa, Chikara
- Nakamura, Sotaro
- Aso, Takumi
- Ikezawa, Satoshi
- Iwami, Kentaro
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