Reciprocal two-slit diffraction experiment

Amr Mohamed Shaarawi, Ioannis M. Besieris, Richard W. Ziolkowski

Yoshiki O-oka, S. Fukatsu

Temporal ghost diffraction (TGD) is observed by taking two-photon cross-correlation in the configuration of reciprocal two-slit diffraction (2SD) where interference fringes develop on the light source side as opposed to the detector side. To this end, a narrow-band chaotic light source and a gated detector are used in the frequency-time domain, which emulate a randomly pointing incoherent light source and a stationary pinhole detector in the momentum-space domain, respectively. Spectral fringes with visibility that closely follows a sinc function of spectral bandwidth are clear evidence that legitimate TGD fringes due to two-photon interference develop even with classical light.

Paul Peter Urone, Roger A. Hinrichs

Mario Iona

Yoshiki O-oka, S. Fukatsu

Temporal ghost diffraction (TGD) is observed by taking two-photon cross-correlation in the configuration of reciprocal two-slit diffraction where interference fringes develop on the light source side as opposed to the detector side. To this end, a narrow-band chaotic light source and a gated detector are used in the frequency-time domain, which emulate a randomly pointing incoherent light source and a stationary pinhole detector in the momentum-space domain, respectively. Spectral fringes with a signed visibility that closely follows a sinc function of the spectral bandwidth are clear evidence that legitimate TGD fringes due to two-photon interference have developed. This compares with the previous attempt [M. Bellini et al., Phys. Rev. Lett. 90, 043602 (2003)] that is essentially ``ghost imaging of spectral fringes'' to be distinguished from TGD, which implies that the putative GD reports in the literature might demand a revision in terms of their physical insights.

Hui Peng

The interference and the diffraction are two basic phenomena in physical optics. We have shown the phenomenon that, in the experiment of two slits with the certain angle between two slits, the partial interference pattern is embedded in the two diffraction patterns, namely, there is the partial interference + diffraction hybrid patterns. angle 2 slits Patterns angle 2 slits Patterns 00 30 60 120 180 240 300 360 420 450 In this article, we show that the nature and the characteristics of the patterns depend not only on the distance from the diaphragm, but also on the angle between two slits. Namely, when the angle between two slits varies from 00 to 450, the pattern varies from the interference pattern to the hybrid patterns (i.e., the partial interference pattern embedded in diffraction patterns) to the diffraction patterns. Challenge is to interpret consistently the hybrid patterns.