Photon-sparse microscopy: visible light imaging using infrared illumination

Aspden, R. et al. (2015) Photon-sparse microscopy: visible light imaging using infrared illumination. Optica, 2(12), pp. 1049-1052. (doi: 10.1364/OPTICA.2.001049)

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Conventional imaging systems rely upon illumination light that is scattered or transmitted by the object and subsequently imaged. Ghost-imaging systems based on parametric down-conversion use twin beams of position-correlated signal and idler photons. One beam illuminates an object while the image information is recovered from a second beam that has never interacted with the object. In this Letter, we report on a camera-based ghost imaging system where the correlated photons have significantly different wavelengths. Infrared photons at 1550 nm wavelength illuminate the object and are detected by an InGaAs/InP single-photon avalanche diode. The image data are recorded from the coincidently detected, position-correlated, visible photons at a wavelength of 460 nm using a highly efficient, low-noise, photon-counting camera. The efficient transfer of the image information from infrared illumination to visible detection wavelengths and the ability to count single photons allows the acquisition of an image while illuminating the object with an optical power density of only 100  pJ cm−2 s−1. This wavelength-transforming ghost-imaging technique has potential for the imaging of light-sensitive specimens or where covert operation is desired.

Item Type:Articles
Additional Information:Funding. Engineering and Physical Sciences Research Council (EPSRC) (EP/I012451/1, K015338/1); European Research Council (ERC) (192382).
Glasgow Author(s) Enlighten ID:Padgett, Professor Miles and Mertens, Miss Lena and Aspden, Mr Reuben and Gemmell, Mr Nathan and Hadfield, Professor Robert and Tasca, Dr Daniel and Morris, Mr Peter and Tanner, Dr Michael and Boyd, Mr Robert
Authors: Aspden, R., Gemmell, N. R., Morris, P. A., Tasca, D. S., Mertens, L., Tanner, M. G., Kirkwood, R. A., Ruggeri, A., Tosi, A., Boyd, R. W., Buller, G. S., Hadfield, R. H., and Padgett, M. J.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optica
Publisher:Optical Society of America
ISSN (Online):2334-2536
Copyright Holders:Copyright © 2015 Optical Society of America
First Published:First published in Optica 2(12):1049-1052
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.
Data DOI:10.5525/gla.researchdata.229

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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