Abstract
The electric and magnetic light absorption by small metallic particles of an ellipsoidal shape has been studied theoretically in frequency regions that are higher and lower than the characteristic frequency of an electron free path between walls of the particle. The assumption of diffuse reflection of electrons from an inner surface of the particle is taken as boundary conditions of the problem. Analytical expressions for the absorbed power are obtained provided that the thickness of a skin layer is large enough compared with a particle size. Size and shape effects on the absorption are investigated for three polarizations of an incident radiation. The particles may be either larger or smaller than the electron free path. The dependence of the relative contribution of the electric and magnetic absorption on the degree of particle asymmetry is discussed in detail for different wave polarizations. Similar dependence for the ratio of longitudinal and transverse components of the conductivity tensor are studied as well.
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