Beating classical imaging limits with entangled photons

Miles Padgett; Ermes Toninelli; Thomas Gregory; Paul-Antoine Moreau

doi:10.1117/12.2515497

1 March 2019 Beating classical imaging limits with entangled photons

Miles Padgett, Ermes Toninelli, Thomas Gregory, Paul-Antoine Moreau

Proceedings Volume 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology; 109341R (2019) https://doi.org/10.1117/12.2515497
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

How can quantum mechanics deliver better imaging performance? Parametric down-conversion sources produce pairs of photons that are correlated in many degrees of freedom, including their spatial positions. By using a camera to detect these pairs of photons it is possible configure imaging systems that can either beat the classical resolution limit or the classical noise limit. We demonstrate how a simple down-conversion source based on a laser and non-linear crystal can be combined with an EMCCD camera to achieve either of these outcomes. Firstly, when both photons pass through the sample, we show a full-field, resolution-enhancing scheme, based on the centroid estimation of the photon pairs. By optimising the software control of the EMCCD camera running in the photon-sparse regime we achieve a resolution enhancement over the equivalent classical limit. Secondly, we show a similar scheme but where only one of the two photons pass through the sample and the other acts as a reference, in this case the ratio of the two resulting images eliminates the background noise of the camera, and background light, achieving an increase in image contrast.

Conference Presentation

Citation Download Citation

Miles Padgett, Ermes Toninelli, Thomas Gregory, and Paul-Antoine Moreau "Beating classical imaging limits with entangled photons", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109341R (1 March 2019); https://doi.org/10.1117/12.2515497

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