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Coherent Backscattering of Spatially Entangled Photons

Mamoon Safadi, Ohad Lib, Yaron Bromberg

We report the first observation of coherent backscattering of spatially entangled photons and show that the backscattering cone of entangled photons corresponds to that of single photons with half the wavelength.

Conference on Lasers and Electro-OpticsJan 1, 20210 citations

Coherent backscattering of entangled photon pairs

Mamoon Safadi, Ohad Lib, Ho-Chun Lin +3 more

arXiv:2203.09650Nature PhysicsJan 23, 202310 citations

Observation of Two-Photon Speckle Patterns

Wouter H. J. Peeters, J. J. D. Moerman, Martin P. van Exter

We report the observation of speckle patterns in quantum correlations within light that is scattered by a disordered medium. The random medium is illuminated with spatially entangled photon pairs, and fourth-order speckle patterns are spatially resolved by two independently scanning detectors. Spatial entanglement gives two-photon speckle a much richer structure than ordinary one-photon speckle. Our experiments demonstrate that two-photon speckle from a surface scatterer and a volume scatterer look entirely different.We report the observation of speckle patterns in quantum correlations within light that is scattered by a disordered medium. The random medium is illuminated with spatially entangled photon pairs, and fourth-order speckle patterns are spatially resolved by two independently scanning detectors. Spatial entanglement gives two-photon speckle a much richer structure than ordinary one-photon speckle. Our experiments demonstrate that two-photon speckle from a surface scatterer and a volume scatterer look entirely different.

Physical Review LettersApr 27, 201087 citations

Partial Nonlinear Reciprocity Breaking through Ultrafast Dynamics in a Random Photonic Medium

Otto L. Muskens, Paul Venn, Timmo van der Beek +1 more

We demonstrate that ultrafast nonlinear dynamics gives rise to reciprocity breaking in a random photonic medium. Reciprocity breaking is observed via the suppression of coherent backscattering, a manifestation of weak localization of light. The effect is observed in a pump-probe configuration where the pump induces an ultrafast step change of the refractive index during the dwell time of the probe light in the material. The dynamical suppression of coherent backscattering is reproduced well by a multiple scattering Monte Carlo simulation. Ultrafast reciprocity breaking provides a distinct mechanism in nonlinear optical media, which opens up avenues for the active manipulation of mesoscopic transport, random lasers, and photon localization.We demonstrate that ultrafast nonlinear dynamics gives rise to reciprocity breaking in a random photonic medium. Reciprocity breaking is observed via the suppression of coherent backscattering, a manifestation of weak localization of light. The effect is observed in a pump-probe configuration where the pump induces an ultrafast step change of the refractive index during the dwell time of the probe light in the material. The dynamical suppression of coherent backscattering is reproduced well by a multiple scattering Monte Carlo simulation. Ultrafast reciprocity breaking provides a distinct mechanism in nonlinear optical media, which opens up avenues for the active manipulation of mesoscopic transport, random lasers, and photon localization.

arXiv:1202.2729Physical Review LettersMay 31, 201225 citations

Quantum mesoscopic physics: Coherent backscattering of light by cold atoms

T. Chanelière, G. Labeyrie, Christian Miniatura +2 more

Propagation in a random medium is often described by a random walk and a diffusion coefficient. However in the mesoscopic regime, where wave properties cannot be neglected, interferences alter the diffusion process leading in extreme situations to strong (Anderson) localisation. The recent observation of coherent backscattering of light by laser cooled atoms has opened the way to new studies in previously not accessible regimes. In this paper we present some of the questions addressed by these experiments, allowing for a more complete understanding of the physical processes involved in this quantum mesoscopic regimePropagation in a random medium is often described by a random walk and a diffusion coefficient. However in the mesoscopic regime, where wave properties cannot be neglected, interferences alter the diffusion process leading in extreme situations to strong (Anderson) localisation. The recent observation of coherent backscattering of light by laser cooled atoms has opened the way to new studies in previously not accessible regimes. In this paper we present some of the questions addressed by these experiments, allowing for a more complete understanding of the physical processes involved in this quantum mesoscopic regime

Journal de Physique IV (Proceedings)Nov 1, 20041 citation

Light Scattering with Entangled Photons

J. P. Woerdman, Andrea Aiello, D. Voigt +1 more

We study experimentally the scattering of polarization-entangled twin photons by a large variety of inhomogeneous media. The scattered twin photons are generally in a mixed state which shows a surprisingly universal behavior.

Frontiers in OpticsJan 1, 20061 citation

Coherent Backscattering of Entangled Photon Pairs

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Coherent Backscattering of Entangled Photon Pairs

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