12 May 2016 Photon-sparse microscopy: Trans-wavelength ghost imaging
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Ghost imaging systems use down-conversion sources that produce twin output beams of position-correlated photons to produce an image of an object using photons that did not interact with the object. One of these beams illuminates the object and is detected by a single pixel detector while the image information is recovered from the second, spatially correlated, beam. We utilize this technique to obtain images of objects probed with 1.5μm photons whilst developing the image using a highly efficient, low-noise, photon-counting camera detecting the correlated photons at 460nm. 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. We apply image reconstruction techniques based on compressive sensing to reconstruct our images from data sets containing far fewer photons than conventionally required. This wavelength-transforming ghost imaging technique has potential for the imaging of light-sensitive specimens or where covert operation is desired.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Reuben S. Aspden, Reuben S. Aspden, Nathan R. Gemmell, Nathan R. Gemmell, Peter A. Morris, Peter A. Morris, Daniel S. Tasca, Daniel S. Tasca, Lena Mertens, Lena Mertens, Michael G. Tanner, Michael G. Tanner, Robert A. Kirkwood, Robert A. Kirkwood, Alessandro Ruggeri, Alessandro Ruggeri, Alberto Tosi, Alberto Tosi, Robert W. Boyd, Robert W. Boyd, Gerald S. Buller, Gerald S. Buller, Robert H. Hadfield, Robert H. Hadfield, Miles J. Padgett, Miles J. Padgett, "Photon-sparse microscopy: Trans-wavelength ghost imaging", Proc. SPIE 9824, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII, 982407 (12 May 2016); doi: 10.1117/12.2223378; https://doi.org/10.1117/12.2223378


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