Shan Xin, Li Zile, Dai Qi, Li Jiaxin, Fu Rao, He Zhixue, Tao Jin, Zheng Guoxing
Opt Lett. 2021 Nov 1;46(21):5417-5420. doi: 10.1364/OL.442477.
Designing a color hologram with conventional metasurfaces usually resorts to a supercell strategy or single-sized approach with different incident angles. However, these designs still have their own drawbacks that need to be further solved. Herein, we show a new, to the best of our knowledge, single-sized strategy to design full-color geometric meta-holograms by utilizing the conjugation property of two circularly polarized lights with opposite handedness and diffraction dispersion. The experimentally captured holographic color images are reconstructed with high quality and without cross talk, which agrees well with our theoretical prediction. Moreover, only with an appropriate combination of wavelength and polarization state can color images be observed accurately. Our strategy provides a simple and effective approach for full-color meta-holography and offers significant potential in image display, information storage, etc.
使用传统超表面设计彩色全息图通常采用超胞策略或针对不同入射角的单一尺寸方法。然而，这些设计仍有各自的缺点需要进一步解决。在此，据我们所知，我们展示了一种新的单一尺寸策略，通过利用具有相反旋向的两个圆偏振光的共轭特性和衍射色散来设计全彩色几何超表面全息图。实验捕获的全息彩色图像被高质量重建且无串扰，这与我们的理论预测吻合良好。此外，只有波长和偏振态进行适当组合才能准确观察到彩色图像。我们的策略为全彩色超表面全息术提供了一种简单有效的方法，并在图像显示、信息存储等方面具有巨大潜力。
