Coherent imaging of a pure phase object with classical incoherent light

Morten Bache, D. Magatti, F. Ferri, A. Gatti, E. Brambilla, L. A. Lugiato

Research output: Contribution to journalJournal articleResearchpeer-review


By using the ghost imaging technique, we experimentally demonstrate the reconstruction of the diffraction pattern of a pure phase object by using the classical correlation of incoherent thermal light split on a beam splitter. The results once again underline that entanglement is not a necessary feature of ghost imaging. The light we use is spatially highly incoherent with respect to the object (approximate to 2 mu m speckle size) and is produced by a pseudo-thermal source relying on the principle of near-field scattering. We show that in these conditions no information on the phase object can be retrieved by only measuring the light that passed through it, neither in a direct measurement nor in a Hanbury Brown-Twiss (HBT) scheme. In general, we show a remarkable complementarity between ghost imaging and the HBT scheme when dealing with a phase object.
Original languageEnglish
JournalPhysical Review A
Issue number5
Pages (from-to)053802
Publication statusPublished - May 2006
Externally publishedYes


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