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Plasmonic Resonant Light Scattering by a Cylinder with Radial Anisotropy

By Yuwen Jin, Dongliang Gao, and Lei Gao
Progress In Electromagnetics Research, Vol. 106, 335-347, 2010


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 coefficients 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 identified by the sign of t/dq, in which εt is the permittivity element in a direction tangential to the local r-axis, and q is the size parameter. The near field distributions for surface and volume modes are illustrated by finite element method. It is found that small changes of anisotropy can affect the scattering efficiencies significantly. Moreover, the quadrupole and octupole resonant peaks may be much higher and sharper than those of dipole resonance in the scattering efficiency spectra.


Yuwen Jin, Dongliang Gao, and Lei Gao, "Plasmonic Resonant Light Scattering by a Cylinder with Radial Anisotropy," Progress In Electromagnetics Research, Vol. 106, 335-347, 2010.


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