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arXiv · 1003.5065

Parallel heterodyne detection of dynamic light scattering spectra from gold nanoparticles diffusing in viscous fluids

Michael Atlan·Pierre Desbiolles·Michel Gross·Maite Coppey-Moisan
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Abstract

We developed a microscope intended to probe, using a parallel heterodyne receiver, the fluctuation spectrum of light quasi-elastically scattered by gold nanoparticles diffusing in viscous fluids. The cutoff frequencies of the recorded spectra scale up linearly with those expected from single scattering formalism in a wide range of dynamic viscosities (1 to 15 times water viscosity at room temperature). Our scheme enables ensemble-averaged optical fluctuations measurements over multispeckle recordings in low light, at temporal frequencies up to 10 kHz, with a 12 Hz framerate array detector.

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Michael Atlan, Pierre Desbiolles, Michel Gross, Maite Coppey-Moisan. 2010-03-26. Parallel heterodyne detection of dynamic light scattering spectra from gold nanoparticles diffusing in viscous fluids. https://doi.org/10.1364/ol.35.000787

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