Specially shaped laser pulses can be used to change the state of electrons in a molecule. This process only takes several attoseconds—but it can initiate another, much slower process: The splitting of the molecule into two parts. Laser pulses can be used to initiate or suppress chemical reactions in a controlled way.
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Theoretical fundamentals of short pulse laser–metal interaction: A review - ScienceDirect
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The world's shortest laser pulse
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GHz burst mode femtosecond laser pulses can create unique two-dimensional periodic surface nanostructures