Retrieving time-dependent Green's functions in optics with low-coherence interferometry
arXiv:1407.0852 · doi:10.1103/PhysRevLett.114.023901
Abstract
We report on the passive measurement of time-dependent Green's functions in the optical frequency domain with low-coherence interferometry. Inspired by previous studies in acoustics and seismology, we show how the correlations of a broadband and incoherent wave-field can directly yield the Green's functions between scatterers of a complex medium. Both the ballistic and multiple scattering components of the Green's function are retrieved. This approach opens important perspectives for optical imaging and characterization in complex scattering media.
5 pages, 4 figures
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