Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1542682 | Optics Communications | 2006 | 8 Pages |
Abstract
We present an optical encryption method based on geometrical phase, which is originated from polarization manipulation. The decrypted picture is retrieved by measuring the polarization of the beam emerging from the encrypted element. The encrypted element is achieved by using a computer-generated space-variant subwavelength dielectric grating. Theoretical analyses of the optical concept by use of Jones and Mueller formalisms, as well as experimental results including full optical decryption process are introduced. Digital implementation and the possibility of using watermarking are also discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Gabriel Biener, Avi Niv, Vladimir Kleiner, Erez Hasman,