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Article

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Published version

Publication date

2016-04-04

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/118404

Optical encryption in the longitudinal domain of focused fields

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https://doi.org/10.1364/OE.24.006793

Abstract

We develop a method for encoding information in the longitudinal component of a focused field. Focused beams display a nonzero contribution of the electric field in the direction of propagation. However, the associated irradiance is very weak and difficult to isolate from the transverse part of the beam. For these reasons, the longitudinal component of a focused field could be a good choice for encoding and securing information. Using the Richards and Wolf formalism we show how to encrypt information in the longitudinal domain of the focal area. In addition, we use quantum imaging techniques to enhance the security and to prevent unauthorized access to the information. To the best of our knowledge, this is the first report on using the longitudinal component of the focused fields in optical security.

Subject

Polarització (Llum), Òptica física, Camps electromagnètics, Xifratge (Informàtica), Fotònica, Seguretat informàtica, Reconeixement òptic de formes

Subject (English)

Polarization (Light), Physical optics, Electromagnetic fields, Data encryption (Computer science), Photonics, Computer security, Optical pattern recognition

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Citation

CARNICER GONZÁLEZ, Arturo, et al. Optical encryption in the longitudinal domain of focused fields. Optics Express. 2016. Vol. 24, num. 7, pags. 6793-6801. ISSN 1094-4087. [consulted: 7 of August of 2026]. Available at: https://hdl.handle.net/2445/118404

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