Wave-particle duality in asymmetrical double-slit interference experiments

Abstract We perform spectral analysis based on suitable theoretical correlations between V-wave visibility and D-particle distinguishability to verify wave-particle duality in asymmetrical double-slit experiments. The typical interference spectra obtained in a recent experiment ensure the single-photon approximation in the Fraunhofer far-field condition. The results show that our theoretical model, following the complementarity principle, is inconsistent with the experimental data at the first main minima of the diffraction distribution, where unexpected interference was observed.