Folding up neatly as a very 80s camper van, Super Van City was an absolutely magical toy. It genuinely did feel like a micro sized city, which somehow found space for kids to use all of their Micro Machines vehicles.
Erbium and Neodymium doped fibers were drawn to diameters down to one micrometer and coated with a metallic mirror. Then fluorescence lifetimes were measured by time resolved single photon counting. Lifetime reductions of up to 45% were observed. Furthermore changes in the Nd fluorescence spectrum were measured.
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