Abstract
In a recent article, Jacobson et al.1 have shown theoretically that the measured de Broglie wavelength of an object is dependent of its internal structure, A fourth-order Young interference experiment is done to demonstrate a practical way to measure the photonic de Broglie wavelength of a two-photon wave- packet. Light in the two-photon state generated collinearly in the process of spontaneous parametric down-conversion. By modifying the transverse field profile of the pump laser beam that generates the two-photon beam we demonstrate experimentally and theoretically2 that it is possible to measure the de Broglie wavelength of the constituents parts of the wavepacket, the de Broglie wavelength of the two-photon wavepacket (biphoton) as a whole and an undefined intermediate de Broglie wavelength between the two cases.
© 1999 Optical Society of America
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