  The theory for the electric and magnetic fields energy absorption by small
metallic particles subjected to the irradiation by ultrashort laser pulses of
different duration in the region of surface plasmon excitation is developed.
For the particles of the oblate or prolate spheroidal shape there has been
found the dependence of the absorbed energy on a number of factors, including a
particle radius, a degree of the shape deviation from a spherical one, a pulse
duration, the orientation of the magnetic field upon particle, the magnitude of
carrier frequency, and the value of a shift of the carrier frequency of a laser
ray from the frequency of the surface plasmon excitation in a spherical
particle. An appreciable absorption grows at the length of free electron pass
large compared to the particle size is established. The phenomenological and
kinetic approach is compared each with other.
