Photon ensemble correlation spectroscopy enables decorrelation-rate-limited ultrafast measurement of diffusive particle dynamics

Optics Letters
Pei LiPeng Li

Abstract

In contrast to conventional dynamic light scattering (DLS) measurement via a single sampling volume (SV) observation over a long time span, we propose a novel technique named "photon ensemble correlation spectroscopy" for ultrafast characterization of diffusive particle dynamics through decorrelation analysis of complex-valued DLS scattering signals from an ensemble of independent SVs. We confirm that the ensemble analysis provides a decorrelation-rate-limited ultrafast measurement and demonstrates the feasibility of imaging spatially resolved particle dynamics. Moreover, the use of complex-valued signals gives additional superiority in terms of reliability.

References

Jan 1, 1986·Proceedings of the National Academy of Sciences of the United States of America·J PeetermansT Tanaka
Jul 30, 2003·Optics Letters·Adam WaxJoseph A Izatt
Jul 28, 2006·Nature·George M Whitesides
Apr 21, 2003·Optics Express·R LeitgebAdolf Fercher
Oct 6, 2012·Optics Express·Jonghwan LeeDavid A Boas
Feb 12, 2014·Optics Express·Stephane BroilletMarcel Leutenegger

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