The rotational correlation function of anisotropic colloidal particles can be measured by observing the fluctuations of the depolarized intensity scattered in the forward direction. In this work we present a theoretical treatment of forward depolarized light scattering. Our calculations show the importance of the insertion of a quarter-wave plate between the scattering cell and the analyzer. The role of the quarter-wave plate is to generate a heterodyne signal between the transmitted beam and the depolarized forward scattered held. In order to illustrate the theoretical calculations, we present experimental results obtained with dispersions of fluorinated polymer. colloids and with solutions of tobacco mosaic virus.
Degiorgio, V., Bellini, T., Piazza, R., Mantegazza, F. (1997). Forward depolarized light scattering: Heterodyne versus homodyne detection. Intervento presentato a: Proceedings of the Workshop on Colloid Physics, UNIV KONSTANZ, KONSTANZ, GERMANY [10.1016/S0378-4371(96)00348-2].
Forward depolarized light scattering: Heterodyne versus homodyne detection
MANTEGAZZA, FRANCESCO
1997
Abstract
The rotational correlation function of anisotropic colloidal particles can be measured by observing the fluctuations of the depolarized intensity scattered in the forward direction. In this work we present a theoretical treatment of forward depolarized light scattering. Our calculations show the importance of the insertion of a quarter-wave plate between the scattering cell and the analyzer. The role of the quarter-wave plate is to generate a heterodyne signal between the transmitted beam and the depolarized forward scattered held. In order to illustrate the theoretical calculations, we present experimental results obtained with dispersions of fluorinated polymer. colloids and with solutions of tobacco mosaic virus.
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