High-resolution grayscale image hidden in a laser beam

Fuyong Yue; Chunmei Zhang; Xiao-Fei Zang; Dandan Wen; Brian D Gerardot; Shuang Zhang; Xianzhong Chen

doi:10.1038/lsa.2017.129

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High-resolution grayscale image hidden in a laser beam

Original Articles

- High-resolution grayscale image hidden in a laser beam
- Light: Science & Applications Vol. 7, Issue 1, (2018)
- Affiliations：
  
  1.SUPA, Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK
  2.Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
  3.School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK
- Author bio：
  
  S Zhang, Email: s.zhang@bham.ac.uk
  X Chen, Email: x.chen@hw.ac.uk
- Funds：
- DOI：10.1038/lsa.2017.129
  CLC：
- Published：2018，
  
  Published Online：26 January 2018，
  
  Received：13 June 2017，
  
  Revised：25 August 2017，
  
  Accepted：30 August 2017
- Accepted：
Scan QR Code
Yue, F. Y. et al. High-resolution grayscale image hidden in a laser beam. Light: Science & Applications, 1, 17129 (2018).
DOI：

Yue, F. Y. et al. High-resolution grayscale image hidden in a laser beam. Light: Science & Applications, 1, 17129 (2018). DOI： 10.1038/lsa.2017.129.

摘要

Abstract

Images perceived by human eyes or recorded by cameras are usually optical patterns with spatially varying intensity or color profiles. In addition to the intensity and color

the information of an image can be encoded in a spatially varying distribution of phase or polarization state. Interestingly

such images might not be able to be directly viewed by human eyes or cameras because they may exhibit highly uniform intensity profiles. Here

we propose and experimentally demonstrate an approach to hide a high-resolution grayscale image in a square laser beam with a size of less than half a millimeter. An image with a pixel size of 300 × 300 nm is encoded into the spatially variant polarization states of the laser beam

which can be revealed after passing through a linear polarizer. This unique technology for hiding grayscale images and polarization manipulation provides new opportunities for various applications

including encryption

imaging

optical communications

quantum science and fundamental physics.

关键词

Keywords

grayscale imagemetasurfacepolarization manipulation

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