Fig. 1. (a) Experimental setup. PBS, polarizing beam splitter; HL, homogenization lens; PPKTP, periodically poled potassium titanyl phosphate; RC, resolution card; SPD, single photon detector. (b) Resolution card pattern.

Fig. 2. Quantum correlated imaging patterns based on the Gaussian pump beam.

Fig. 3. Quantum correlated imaging patterns based on the flat-top pump beam. The illustration in the upper right corner is a cross-sectional view of the intensity distribution of the flat-top beam used in the experiment.