Geometrical phase image encryption obtained with space-variant subwavelength gratings

Gabriel Biener, Avi Niv, Vladimir Kleiner, Erez Hasman

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


An optical encryption method based on a geometrical phase produced by space-variant polarization manipulation is presented. The decrypted picture is retrieved either by a polarization measurement of the beam emerging from the encrypted element or by a single intensity measurement of the beam transmitted through the encrypted element followed by an optical key element. Both elements are realized by use of computer-generated space-variant subwavelength dielectric gratings. Theoretical analyses of the optical concept are presented along with experimental results.

Original languageEnglish
Pages (from-to)1096-1098
Number of pages3
JournalOptics Letters
Issue number10
StatePublished - 15 May 2005
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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