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We study the light scattering of homogenous radially-anisotropic sphericalparticles. It is shown that radial anisotropy can be employed to tuneeffectively the electric resonances, and thus enable flexible overlapping ofelectric and magnetic dipoles of various numbers, which leads to unidirectionalforward super-scattering at different spectral positions. We further revealthat through adjusting the radial anisotropy parameters, electric and magneticresonances of higher orders can be also made overlapped, thus furthercollimating the forward scattering lobes. The ultra-directionalsuper-scattering we have obtained with individual homogenous radiallyanisotropic spherical particles may shed new light to the design of compact andefficient nanoantennas, which may find various applications in solar cells,bio-sensing and many other antenna based researches.

Ultra-directional super-scattering of homogenous spherical particles with radial anisotropy