| Novel Polarization Dependence in Diffusing-Wave Spectroscopy of Crystallizing Colloidal Suspensions (1994) | |||||||||
Abstract | |||||||||
| We report an unexpected behavior of the intensity autocorrelation functions CVV ( t ) (polarized) and CHH ( t ) (depolarized) of multiply scattered light from dense colloidal polyball crystals under certain conditions. We find that Cvv(t) saturates at large times as expected for a frozen phase, while CHH(t) decays to zero in a short time as in a fluid. We present a new phenomenological model for this behavior based on decoupled translational and orientational fluctuations in a weakly depolarizing medium. Our study highlights the greater sensitivity of depolarized diffusing-wave spectroscopy as a probe of the dynamics of the medium. | |||||||||
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