Size effect for plasmon resonance in metallic nanoparticles has been studied by finite element method solution of the Maxwell equations (COMSOL), by the Mie approach and microscopic random phase approximation model. Comparison with Au, Ag nanoparticles experimental data for light extinction in colloidal solutions with different particle sizes is presented for the three types of approach.
Interaction of argon clusters with intense laser pulses is studied theoretically. Free electrons energy distribution is studied. Differences between infrared and vacuum ultraviolet frequency regimes are pointed out. Clear physical interpretation of the obtained results is given.
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