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Phys. Rev. Lett. 82, 2868–2871 (1999)

Measurement of the de Broglie Wavelength of a Multiphoton Wave Packet

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E. J. S. Fonseca, C. H. Monken, and S. Pádua*
Departamento de Física, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970 Belo Horizonte MG, Brazil

Received 23 March 1998; published in the issue dated 5 April 1999

See accompanying Physics Focus

A fourth-order Young interference experiment was done to demonstrate a practical way to measure the de Broglie wavelength of a two-photon wave packet. A two-photon collinear beam is generated by type-II spontaneous parametric down-conversion. By modifying the transverse field profile of the pump laser beam that generates the two-photon beam we demonstrate that it is possible to measure the de Broglie wavelength of the single-photon constituents of the two-photon wave packet, the de Broglie wavelength of the two-photon wave packet as a whole and an ill defined intermediate de Broglie wavelength between the two cases.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.2868
DOI:
10.1103/PhysRevLett.82.2868
PACS:
42.50.Ar, 03.65.Bz

*Author to whom correspondence should be addressed. Email address: spadua@fisica.ufmg.br