Temporal and spatial superbunching effects from a pair of modulated distinguishable classical lights

From the Feynman path integration theory of view, the Hanbury Brown–Twiss effect would not be observed for one definite two-photon propagation path, as well as the superbunching effect. Here, temporal and spatial superbunching effects are measured from a pair of modulated distinguishable classical lights. These interesting phenomena are realized by passing two orthogonal polarized laser beams through two rotating ground glass plates in sequence. To understand the underlying physical process, the intensity fluctuation correlation theory is developed to describe the superbunching effect in the temporal and spatial domains, which agrees with experimental results well. Such experimental results are conducive to the study of the superbunching effect, which plays an important role in improving the performance in related applications, such as the contrast of ghost imaging.