Journal
OPTICS EXPRESS
Volume 28, Issue 15, Pages 21549-21559Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.396372
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Funding
- National Key Research and Development Program of China [2017YFB1002900]
- Ministry of Science and Technology, China
- Fok Ying-Tong Education Foundation of China [161009]
- Beijing Nova Program [Z171100001117047]
- Natural Science Foundation of Beijing Municipality [4172057]
- National Natural Science Foundation of China [61775019]
- Beijing Outstanding Young Scientist Program [BJJWZYJH01201910007022]
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Planar metalenses are regarded as promising functional nanodevices because of their lightweight, nano-resolution properties, and, therefore, they can serve as versatile platforms for imaging and Fourier transforming. Here, we demonstrate a meta-device that functions as an isotropic bifocal all-dielectric Huygens' metalens to realize nanoscale real-time coaxial digital hologram generation. We design an isotropic bifocal metalens for micro/nano hologram recording, and the metalens utilizes the complete region compared to a previously reported interleaved multifocal metalens scheme. In addition, the hologram generation does not depend on complex polarization conversion, thereby improving the practical efficiency. For high-fidelity reconstruction, compressive reconstruction is utilized to remove twin-image and zero-order items and to suppress noise. Such concept would be extended to white-light achromatic metaholography and three-dimensional micro/nano in vivo incoherent super-resolution imaging under subwavelength modulation. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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