Three-dimensional orientation-unlimited polarization encryption by a single optically configured vectorial beam

Xiangping Li, Tzu Hsiang Lan, Chung-Hao Tien, Min Gu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

193 Scopus citations

Abstract

The interplay between light polarization and matter is the basis of many fundamental physical processes and applications. However, the electromagnetic wave nature of light in free space sets a fundamental limit on the three-dimensional polarization orientation of a light beam. Although a high numerical aperture objective can be used to bend the wavefront of a radially polarized beam to generate the longitudinal polarization state in the focal volume, the arbitrary three-dimensional polarization orientation of a beam has not been achieved yet. Here we present a novel technique for generating arbitrary three-dimensional polarization orientation by a single optically configured vectorial beam. As a consequence, by applying this technique to gold nanorods, orientation-unlimited polarization encryption with ultra-security is demonstrated. These results represent a new landmark of the orientation- unlimited three-dimensional polarization control of the lightg -matter interaction.

Original languageEnglish
Article number998
JournalNature Communications
Volume3
DOIs
StatePublished - 17 Sep 2012

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