期刊
PHOTONICS RESEARCH
卷 10, 期 4, 页码 1031-1038出版社
CHINESE LASER PRESS
DOI: 10.1364/PRJ.450354
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资金
- National Key Research and Development Program of China [2021YFA1401200]
- Beijing Outstanding Young Scientist Program [BJJWZYJH01201910007022]
- National Natural Science Foundation of China [U21A20140, 92050117]
- Beijing Municipal Science and Technology Commission, Administrative Commission of Zhongguancun Science Park [Z211100004821009]
- Fok Ying-Tong Education Foundation of China [161009]
This article introduces the technology of using dielectric metasurfaces for polarization multiplexing, which can achieve flexible polarization transformation and complex optical encryption, and is expected to be widely used in smart compact devices.
With the development of micro/nano fabrication technology, metasurface holography has emerged as a revolutionary technology for the manipulation of light with excellent performance. However, for applications of full-Stokes polarization encryption and time sequence holographic display, multiplexing strategies of metasurfaces with large bandwidths and simple operations still need to be developed. As one of the most popular schemes of multiplexing, polarization multiplexed metasurfaces have shown flexible recording abilities for both free-space beam and surface waves. Here, by using a dielectric metasurface equipped with double phase holograms, we have achieved flexible polarization multiplexed transformations from one full-Stokes space to another. The vectorial hologram is optimized by a hybrid genetic algorithm and digitalized with subwavelength modulated units. Based on a quantitative map and remarkable information capacity, time sequence holographic display and complex optical encryption are experimentally demonstrated by changing input/output polarization channels in real time. We believe our method will facilitate applications in smart compact devices of dynamic display, dynamic optical manipulation, optical encryption, anticounterfeiting, etc. (C) 2022 Chinese Laser Press
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