期刊
ADVANCED OPTICAL MATERIALS
卷 10, 期 22, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202201478
关键词
full-color; optical encryption; phase difference; spatial polarization; vectorial meta-holography
资金
- National Key R&D Program of China [2018YFB1107205, 2016YFA0301302]
- National Natural Science Foundation of China (NSFC) [12134001, 61590933, 11527901]
- Joint Fund for Equipment Pre-research Space Science and Technology [6141B06140601]
This study proposes a method for achieving full-color vectorial metasurface holograms and independent spatial polarization control of reconstructed images using multiplexing and interleaving nanostructures. The research demonstrates potential applications in areas such as secure optical encryption and dynamic color display.
Vectorial metasurface holograms ar realized through segmenting or interleaving nanostructures to modulate spatial polarization of the reconstructed holography on the imaging plane, but it is still a challenge to achieve full-color vectorial meta-holograms with subwavelength meta-molecules and independent spatial polarization control of reconstructed images. Here, this problem is solved by multiplexing the hologram phase for one circularly polarized light and the conjugated hologram phase for another orthogonal circularly polarized light using only a single nanostructure and then interleaving three kinds of metasurfaces for red, green, and blue light in subwavelength meta-molecules. By independent control of the phase difference of two overlapped circularly polarized holographic images for each color, the vectorial field on the imaging plane can be freely manipulated at the pixel scale and dynamically changed with the incident polarization. Therefore, the local color and even contrast of the reconstructed full-color image can be tuned by selecting the incident and output polarization states, demonstrating great potentials in secure optical encryption and dynamic color display.
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