Properties of quantum light represent a tool for overcoming limits of classical optics. Several experiments have demonstrated this advantage ranging from quantum enhanced imaging to quantum illumination. In this work, experimental demonstration of quantum-enhanced resolution in confocal fluorescence microscopy will be presented. This is achieved by exploiting the non-classical photon statistics of fluorescence emission of single nitrogen-vacancy (NV) color centers in diamond. By developing a general model of super-resolution based on the direct sampling of the kth-order autocorrelation function of the photoluminescence signal, we show the possibility to resolve, in principle, arbitrarily close emitting centers. Finally, possible applications of NV-based fluorescent nanodiamonds in biosensing and future developments will be presented.
E. Moreva, P. Traina, J. Forneris, S. Ditalia Tchernij, L. Guarina, C. Franchino, F. Picollo, I. Ruo Berchera, G. Brida, I. P. Degiovanni, V. Carabelli, P. Olivero, and M. Genovese, "Super-resolution from single photon emission: toward biological application," Proc. SPIE 10358, Quantum Photonic Devices, 1035802 (Presented at SPIE Nanoscience + Engineering: August 06, 2017; Published: 29 August 2017); https://doi.org/10.1117/12.2275040.
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