Multiphoton-multiplasmon excitation of C60
Time-of-flight mass spectrometry is used to study the interaction of free C60 molecules with ultrashort high power Ti:sapphire laser pulses. Ionization and fragmentation of C60 by ultrashort high-intensity laser pulses occur predominantly via plasmon excitation. Single and double excitation of collective charge oscillation is observed by remarkably large number of photons. The difference between a
