Utilizing a new scheme with a single-photon-sensitive intensified CCD camera and a femtosecond laser, we have measured signal–idler correlations over the full cone of degenerate type I spontaneous parametric downconversion, thereby establishing wave-vector correlations in two dimensions. We discuss the key features of the camera that are important for its use in twin-photon correlation measurements.
© 2002 Optical Society of America
S. S. R. Oemrawsingh, W. J. van Drunen, E. R. Eliel, and J. P. Woerdman, "Two-dimensional wave-vector correlations in spontaneous parametric downconversion explored with an intensified CCD camera," J. Opt. Soc. Am. B 19, 2391-2395 (2002)