期刊
LASER & PHOTONICS REVIEWS
卷 16, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.202200351
关键词
full-polarization; noninterleaved metasurfaces; optical encryption; vectorial holography
资金
- National Natural Science Foundation of China [52005175, 5211101255]
- Natural Science Foundation of Hunan Province of China [2020JJ5059]
- Shenzhen Science and Technology Program [RCBS20200714114855118]
This study presents a method for full-polarization beam shaping in three-dimensional space using metasurfaces. The method utilizes noninterleaved metasurfaces to achieve independent phase control for two orthogonal circular polarizations. The study also demonstrates a double-level optical encryption scheme by utilizing the extended dimension, providing a compact and general scheme for full-polarization channel wavefront steering.
Metasurface-enabled full-polarization vectorial holography has attracted numerous attention due to the promising applications for multichannel displays, enhanced information capacity, and optical encryption. However, recently showcased design strategies suffer from undesirable cross-talk resulting from interleaved meta-atoms and are restricted to a two-dimensional plane. This work presents a general approach for full-polarization beam shaping in three-dimensional space by completely exploiting the capacity of a noninterleaved metasurface. The noninterleaved metasurface is spin-decoupled, which is capable of achieving independent phase control for the two orthogonal circular polarizations by combining both propagation and geometric phases. As a proof-of-concept, a three-dimensional vectorial holography capable of converting the linear polarized light to holographic images with arbitrary spatial polarization distributions is experimentally demonstrated. Taking use of the extended dimension, the z-axis distance, which provides a new degree of flexibility for boosting information capacity and security, a double-level optical encryption scheme is implemented. This work provides a compact and general scheme for full-polarization channel wavefront steering, unlocking a new door for designing planar polarization functionality devices.
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