O. Schwartz, J. M. Levitt, R. Tenne, S. Itzhakov, Z. Deutsch, D. Oron
The optical diffraction limit, formulated by Abbe 150 years ago, decades before the dawn of quantum mechanics, imposes a bound on imaging resolution in classical optics. Over the last twenty years, many theoretical schemes have been presented for overcoming the diffraction barrier in optical imaging using quantum properties of light. An experimental realization of sub-diffraction limited quantum imaging has, however, remained elusive. Here, we take advantage of non-classical light naturally produced in fluorescence microscopy due to photon antibunching, a fundamentally quantum phenomenon ensuring that fluorophores emit photons one at a time. Using a photon counting digital camera, we detect antibunching-induced second and third order intensity correlations and perform sub-diffraction limited quantum imaging in a standard wide-field fluorescence microscope.
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http://arxiv.org/abs/1212.6003
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