Figure 2
From: Realization of the first sub-shot-noise wide field microscope
Spatial cross correlation function. The 2D map represents the value of the correlation coefficient between two regions of 40 × 40 pixels, chosen approximately in symmetric positions at the detection plane. Here, we exploited the full resolution of the camera (physical pixel of 13 μm), which corresponds to 1.7 μm in the object plane. The peak represents the position in which the regions are well correlated, pixel-by-pixel. Shifting one of the regions in the pixel grid more than the spatial jitter of the correlated photon makes the correlation coefficient drop to zero. The vertical and horizontal sections are shown in the left-hand-side and bottom graphs, respectively, with their fitting Gaussian functions and the indication of the FWHMs. Corr. coeff, correlation coefficient.
