Li Xiangping, Ren Haoran, Chen Xi, Liu Juan, Li Qin, Li Chengmingyue, Xue Gaolei, Jia Jia, Cao Liangcai, Sahu Amit, Hu Bin, Wang Yongtian, Jin Guofan, Gu Min
Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia.
Beijing Engineering Research Center for Mixed Reality and Advanced Display, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China.
Nat Commun. 2015 Apr 22;6:6984. doi: 10.1038/ncomms7984.
The emerging graphene-based material, an atomic layer of aromatic carbon atoms with exceptional electronic and optical properties, has offered unprecedented prospects for developing flat two-dimensional displaying systems. Here, we show that reduced graphene oxide enabled write-once holograms for wide-angle and full-colour three-dimensional images. This is achieved through the discovery of subwavelength-scale multilevel optical index modulation of athermally reduced graphene oxides by a single femtosecond pulsed beam. This new feature allows for static three-dimensional holographic images with a wide viewing angle up to 52 degrees. In addition, the spectrally flat optical index modulation in reduced graphene oxides enables wavelength-multiplexed holograms for full-colour images. The large and polarization-insensitive phase modulation over π in reduced graphene oxide composites enables to restore vectorial wavefronts of polarization discernible images through the vectorial diffraction of a reconstruction beam. Therefore, our technique can be leveraged to achieve compact and versatile holographic components for controlling light.
新兴的基于石墨烯的材料是一种具有特殊电子和光学特性的芳香族碳原子原子层，为开发平面二维显示系统提供了前所未有的前景。在此，我们展示了还原氧化石墨烯可实现用于广角和全彩色三维图像的一次性写入全息图。这是通过单个飞秒脉冲光束发现热还原氧化石墨烯的亚波长尺度多级光学折射率调制来实现的。这一新特性使得能够实现视角高达52度的静态三维全息图像。此外，还原氧化石墨烯中光谱平坦的光学折射率调制可实现用于全彩色图像的波长复用全息图。还原氧化石墨烯复合材料中超过π的大且对偏振不敏感的相位调制能够通过重建光束的矢量衍射来恢复偏振可分辨图像的矢量波前。因此，我们的技术可用于实现紧凑且通用的用于控制光的全息组件。
