title: Low-coherence heterodyne photon correlation spectroscopy.
abstract: 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.
authors.forename: J H
authors.initials: JH
authors.lastname: Johnson
authors.forename: S L
authors.initials: SL
authors.lastname: Siefken
authors.forename: A
authors.initials: A
authors.lastname: Schmidt
authors.forename: R
authors.initials: R
authors.lastname: Corey
authors.forename: P
authors.initials: P
authors.lastname: Saulnier