Abstract
We apply the full-wave electromagnetic theory to study electromagnetic scattering by a small cylindrical particle with radial anisotropy for normally incident light with transverse magnetic (TM) polarization. The scattering coe-cients are derived, when the radial anisotropies in both the permittivity and permeability tensors are taken into account. It is shown that the surface and volume plasmon resonances can be identifled by the sign of dt=dq, in which t is the permittivity element in a direction tangential to the local r-axis, and q is the size parameter. The near fleld distributions for surface and volume modes are illustrated by flnite element method. It is found that small changes of anisotropy can afiect the scattering e-ciencies signiflcantly. Moreover, the quadrupole and octupole resonant peaks may be much higher and sharper than those of dipole resonance in the scattering e-ciency spectra.
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