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Characterizing individual scattering events by measuring the amplitude and phase of the electric field diffusing
Zhongping Jian1, Jeremy Pearce, Daniel M Mittleman
1Department of Electrical and Computer Engineering, Rice University, MS 366, Houston, Texas 77251-1892, USA.
Abstract:
We describe observations of the amplitude and phase of an electric field diffusing through a three-dimensional random medium, using terahertz time-domain spectroscopy. These measurements are spatially resolved with a resolution smaller than the speckle spot size and temporally resolved with a resolution better than one optical cycle. By computing correlation functions between fields measured at different positions and with different temporal delays, it is possible to obtain information about individual scattering events experienced by the diffusing field. This represents a new method for characterizing a multiply scattered wave.