Low-coherence heterodyne photon correlation spectroscopy.
Photon correlation spectroscopy (PCS) is routinely used to investigate the dynamics of colloidal particles undergoing Brownian motion. This technique is applicable to low-density colloidal suspensions in which the effects of multiple light scattering are minimal. We introduce a new low-coherence heterodyne PCS technique that allows direct investigation of colloidal suspensions of higher concentration than previously accessible with standard PCS. In this technique, low-coherence optical heterodyne interferometry is used tosuppress multiple light scattering, allowing preferential detection of single-scattering events.
Johnson
J H
JH
Siefken
S L
SL
Schmidt
A
A
Corey
R
R
Saulnier
P
P