An ultrabroadband 3D achromatic metalens
| Autor: | Balli Fatih, Sultan Mansoor A., Ozdemir Aytekin, Hastings Jeffrey Todd |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Nanophotonics, Vol 10, Iss 4, Pp 1259-1264 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2192-8606 2192-8614 |
| DOI: | 10.1515/nanoph-2020-0550 |
| Popis: | We design and fabricate ultra-broadband achromatic metalenses operating from the visible into the short-wave infrared, 450–1700 nm, with diffraction-limited performance. A hybrid 3D architecture, which combines nanoholes with a phase plate, allows realization in low refractive index materials. As a result, two-photon lithography can be used for prototyping while molding can be used for mass production. Experimentally, a 0.27 numerical aperture (NA) metalens exhibits 60% average focusing efficiency and 6% maximum focal length error over the entire bandwidth. In addition, a 200 μm diameter, 0.04 NA metalens was used to demonstrate achromatic imaging over the same broad spectral range. These results show that 3D metalens architectures yield excellent performance even using low-refractive index materials, and that two-photon lithography can produce metalenses operating at visible wavelengths. |
| Databáze: | Directory of Open Access Journals |
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