TY - GEN
T1 - Beating classical imaging limits with entangled photons
AU - Padgett, Miles
AU - Toninelli, Ermes
AU - Gregory, Thomas
AU - Moreau, Paul Antoine
N1 - Publisher Copyright:
© 2019 SPIE CCC.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
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U2 - 10.1117/12.2515497
DO - 10.1117/12.2515497
M3 - Conference contribution
AN - SCOPUS:85064863984
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology
A2 - Shahriar, Selim M.
A2 - Scheuer, Jacob
PB - SPIE
T2 - Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology 2019
Y2 - 2 February 2019 through 7 February 2019
ER -