Abstract
Light scattering techniques are widely used in many fields of
condensed and soft matter physics. Usually these methods are based on
the study of the scattered light in the far field. Recently, a new family of
near field detection schemes has been developed, mainly for the study of
small angle light scattering. These techniques are based on the detection
of the light intensity near to the sample, where light scattered at different
directions overlaps but can be distinguished by Fourier transform analysis.
Here we report for the first time data obtained with a dynamic near field
scattering instrument, measuring both polarized and depolarized scattered
light. Advantages of this procedure over the traditional far field detection
include the immunity to stray light problems and the possibility to obtain
a large number of statistical samples for many different wave vectors in a
single instantaneous measurement. By using the proposed technique we
have measured the translational and rotational diffusion coefficients of
rod-like colloidal particles. The obtained data are in very good agreement
with the data acquired with a traditional light scattering apparatus.
| Original language | Undefined/Unknown |
|---|---|
| Pages (from-to) | 1222-1233 |
| Number of pages | 12 |
| Journal | Optics Express [E] |
| Volume | 17 |
| Issue number | 3 |
| Publication status | Published - 2009 |