Optimizing the use of detector arrays for measuring intensity correlations of photon pairs

Tasca, D.S., Edgar, M.P., Izdebski, F., Buller, G.S. and Padgett, M.J. (2013) Optimizing the use of detector arrays for measuring intensity correlations of photon pairs. Physical Review A: Atomic, Molecular and Optical Physics, 88(1), Art. 013816. (doi:10.1103/PhysRevA.88.013816)

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Abstract

Intensity correlation measurements form the basis of many experiments based on spontaneous parametric down-conversion. In the most common situation, two single-photon avalanche diodes and coincidence electronics are used in the detection of the photon pairs, and the coincidence count distributions are measured by making use of some scanning procedure. Here we analyze the measurement of intensity correlations using multielement detector arrays. By considering the detector parameters such as the detection and noise probabilities, we found that the mean number of detected photons that maximizes the visibility of the two-photon correlations is approximately equal to the mean number of noise events in the detector array. We provide expressions predicting the strength of the measured intensity correlations as a function of the detector parameters and on the mean number of detected photons. We experimentally test our predictions by measuring far-field intensity correlations of spontaneous parametric down-conversion with an electron multiplying charge-coupled device camera, finding excellent agreement with the theoretical analysis.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Edgar, Dr Matthew and Tasca, Dr Daniel
Authors: Tasca, D.S., Edgar, M.P., Izdebski, F., Buller, G.S., and Padgett, M.J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review A: Atomic, Molecular and Optical Physics
Publisher:American Physical Society
ISSN:1050-2947
ISSN (Online):1094-1622
Copyright Holders:Copyright © 2013 American Physical Society
First Published:First published in Physical Review A: Atomic, Molecular and Optical Physics 88(1):013816
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
549871Challenges in Orbital Angular MomentumMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/I012451/1P&A - PHYSICS & ASTRONOMY