Coherent imaging of a pure phase object with classical incoherent light

Details Coherent imaging of a pure phase object with classical incoherent light Coherent imaging of a pure phase object with classical incoherent light

2006-04-06

arxiv.org/abs/quant-ph/0604043v2

Phys. Rev. A 73, 053802 (2006)

Physics

Quantum Physics

13 pages, 11 figures. Published in Physical Review A. Replaced version fixes some problems with Figs. 1, 4 and 10

Scientific paper

10.1103/PhysRevA.73.053802

By using the ghost imaging technique, we experimentally demonstrate the reconstruction of the diffraction pattern of a {\em 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 ($\approx 2 \mu$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.

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