Ultrafast experiments can reveal the spatiotemporal dynamics of nanostructure formation via scattering in background-free optical dark-field microscopy.Scattering of electromagnetic radiation is used in many scientific,industrial and daily applications.In time-resolved experiments using ultrafast lasers,the spatial and temporal coherence of the radiation is of crucial importance for visualizing scattering phenomena.On the macro-scale,an ultrafast video recording at 100 billion frames per second can impressively visualize even the Mach cone superluminal propagation of light in scattering media1;however,imaging objects at the micro-scale via ultrafast microscopy is often challenging:the fact that the coherence of the illuminating laser radiation is manifested in undesired speckle patterns can limit the spatial resolution and thus the single-shot imaging capabilities2.
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