Sanyal, S and Sood, AK and Ramkumar, S and Ramaswamy, S and Kumar, N (1994) Novel Polarization Dependence in Diffusing-Wave Spectroscopy of Crystallizing Colloidal Suspensions. In: Physical Review Letters, 72 (18). pp. 2963-2966.
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.
|Item Type:||Journal Article|
|Additional Information:||Copyright for this article belongs to American Physical Society (APS).|
|Department/Centre:||Division of Physical & Mathematical Sciences > Centre for Theoretical Studies
Division of Physical & Mathematical Sciences > Physics
|Date Deposited:||10 Dec 2004|
|Last Modified:||19 Sep 2010 04:13|
Actions (login required)