Second Harmonic Imaging in Random Media

Tuesday, November 15, 2016 - 11:00am - 12:00pm
Lind 305
Wei Li (University of Minnesota, Twin Cities)
We consider the imaging of small nonlinear scatterers in random media. This problem is analyzed in weakly scattering media which respond linearly to light. We show that for propagation distances within a few transport mean free paths, robust images can be constructed by the coherent interferometry (CINT) imaging functions. We also show that imaging the quadratic susceptibility with CINT yields better result, because that the CINT imaging function for the linear susceptibility has noisy peaks in a region that depends on the geometry of the aperture and the cone of incident directions.