Istituto dei materiali per l'elettronica ed il magnetismo     
Reisinger T., Patel A. A., Reingruber H., Fladischer K., Ernst W. E., Bracco G., Smith H. I., Holst B. Poisson's spot with molecules. In: Physical Review A, vol. 79 article n. 053823. American Physical Society, 2009.
In the Poisson-spot experiment, waves emanating from a source are blocked by a circular obstacle. Due to their positive on-axis interference an image of the source (the Poisson spot) is observed within the geometrical shadow of the obstacle. In this paper we report the observation of Poisson's spot using a beam of neutral deuterium molecules. The wavelength independence and the weak constraints on angular alignment and position of the circular obstacle make Poisson's spot a promising candidate for applications ranging from the study of large molecule diffraction to patterning with molecules.
DOI: 10.1103/PhysRevA.79.053823
Subject matter wave diffraction
Fresnel diffraction

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