期刊
SCIENCE ADVANCES
卷 6, 期 37, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abc0711
关键词
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资金
- National Key R&D Program of China [2018YFA0306200, 2017YFA0205800]
- National Natural Science Foundation of China [61875218, 61705249]
- Youth Innovation Promotion Association CAS [2017285]
- Key Research Project of Frontier Science of CAS [QYZDJSSW-JSC007]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB43010200]
- Shanghai Rising-Star Program [20QA1410400]
- Shanghai Municipal Science and Technology Major Project [2019SHZDZX01]
- Australian Research Council [DP200101353]
- Shanghai Science and Technology Committee [18JC1420401]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials [KF1808]
Metasurfaces provide a compact, flexible, and efficient platform to manipulate the electromagnetic waves. However, chromatic aberration imposes severe restrictions on their applications in broadband polarization control. Here, we propose a broadband achromatic methodology to implement polarization-controlled multifunctional metadevices in mid-wavelength infrared with birefringent meta-atoms. We demonstrate the generation of polarization-controlled and achromatically on-axis focused optical vortex beams with diffraction-limited focal spots and switchable topological charge (L-parallel to = 0 and L-perpendicular to = 2). Besides, we further implement broadband achromatic polarization beamsplitter with high polarization isolation (extinction ratio up to 21). The adoption of all-silicon configuration not only facilitates the integration with CMOS technology but also endows the polarization multiplexing meta-atoms with broad phase dispersion coverage, ensuring the large size and high performance of the metadevices. Compared with the state-of-the-art chromatic aberration-restricted polarization-controlled metadevices, our work represents a substantial advance and a step toward practical applications.
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