Ultrafast imaging plays an important role in physics and chemistry to investigate the femtosecond dynamics of nonuniform samples. The method is based on understanding phenomena induced by an ultrashort laser pump pulse using an ultrashort probe pulse thereafter. The emergence of very successful ultrafast imaging techniques with an extremely high frame-rate is based on wavelength or spatial frequency encoding. In a new report now in Light: Science & Applications, Chen Xie, Remi Meyer, and a team of scientists in China and France used a pump-induced micrografting method to provide detailed in situ characterization of a weak probe pulse. The method is non-destructive and fast to perform and therefore the in-situ probe diagnostic can be repeated to calibrate experimental conditions. The technique will allow previously inaccessible imaging to become feasible across a field of superfast science at the micro- and nanoscale.
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Source: Phys.org