Physics – Optics
Scientific paper
2010-03-26
Optics Letters 35, 5 (2010) 787-789
Physics
Optics
Scientific paper
10.1364/OL.35.000787
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.
Atlan Michael
Coppey-Moisan Maite
Desbiolles Pierre
Gross Michel
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