Physically-Secured Ghost Diffraction and Transmission

Yonggui Cao, Yin Xiao, Zilan Pan, Lina Zhou, Wen Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


A new approach to realizing physically-secured ghost diffraction and transmission is proposed in this letter. A series of random 2D arrays of numbers are used as optical information carriers to transmit original data, e.g., analog signals or images as ghosts. Computer-generated magnification factors are applied for optical data encoding, and physically-generated scaling factors are generated with absorptive filters in free-space optical data transmission. The series of computer-generated magnification factors and physically-generated scaling factors serves as security keys, and is explored to realize high-fidelity and high-security free-space optical data (ghost) transmission. It is experimentally demonstrated that the proposed method is feasible and effective in different environments, i.e., without or with scattering media. The proposed physically-secured ghost diffraction scheme offers a new research perspective on secured optical information (e.g., analog signal) transmission in free space.

Original languageEnglish
Pages (from-to)1238-1241
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number22
Publication statusPublished - 15 Nov 2022


  • free space
  • optical analog-signal transmission
  • Optical encoding
  • physical-layer security
  • scattering media

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Physically-Secured Ghost Diffraction and Transmission'. Together they form a unique fingerprint.

Cite this