Two-color differential dynamic microscopy for capturing fast dynamics

Abstract

Differential dynamic microscopy (DDM) is increasingly used in the fields of soft matter physics and biophysics to extract the dynamics of microscopic objects across a range of wavevectors using optical microscopy. Standard DDM is limited to detecting dynamics no faster than the camera frame rate. We report on an extension to DDM where we sequentially illuminate the sample with spectrally-distinct light and image with a color camera. By pulsing blue and then red light separated by a lag time much smaller than the camera's exposure time we are able to use this two-color DDM method to measure dynamics occurring much faster than the camera frame rate.

arXiv commentThe following article has been accepted by Review of Scientific Instruments

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Cited by in corpus (5)

• Differential dynamic microscopy for the characterization of polymer systems
• Soft Metamaterials: Adaptation and Intelligence
• Ab initio uncertainty quantification in scattering analysis of microscopy
• Convolutional neural networks applied to differential dynamic microscopy reduces noise when quantifying heterogeneous dynamics
• Multi-Tau Pulsed Illumination Differential Dynamic Microscopy with 80 $\mu$s Resolution