https://www.nextbigfuture.com/2007/09/femtoseconds-changes-in-reflexivity.html
Femtoseconds changes in reflexivity useful for optical switching | NextBigFuture.com
Apr 7, 2017 - In a recent experiment short laser pulses, falling on an organic salt target, momentarily changed the material from an insulator (a bad reflector of light) to
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