Quantum digital spiral imaging

Chen, L., Lei, J. and Romero, J. (2014) Quantum digital spiral imaging. Light: Science and Applications, 3, e153. (doi: 10.1038/lsa.2014.34)

Abstract

We demonstrate that the combination of digital spiral imaging with high-dimensional orbital angular momentum (OAM) entanglement can be used for efficiently probing and identifying pure phase objects, where the probing light does not necessarily touch the object, via the experimental, non-local decomposition of non-integer pure phase vortices in OAM-entangled photon pairs. The entangled photons are generated by parametric downconversion and then measured with spatial light modulators and single-mode fibers. The fractional phase vortices are defined in the idler photons, while their corresponding spiral spectra are obtained non-locally by scanning the measured OAM states in the signal photons. We conceptually illustrate our results with the biphoton Klyshko picture and the effective dimensionality to demonstrate the high-dimensional nature of the associated quantum OAM channels. Our result is a proof of concept that quantum imaging techniques exploiting high-dimensional entanglement can potentially be used for remote sensing.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Romero, Dr Jacqui
• Authors: Chen, L., Lei, J., and Romero, J.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Light: Science and Applications
• Publisher: Nature Publishing Group
• ISSN: 2047-7538
• ISSN (Online): 2047-7538
• Copyright Holders: Copyright © 2014 CIOMP
• First Published: First published in Light: Science and Applications 3:e153
• Publisher Policy: Reproduced under a Creative Commons License