Demonstration of magnetic dipole resonances of dielectric nanospheres in the visible region |
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Authors: | Evlyukhin Andrey B Novikov Sergey M Zywietz Urs Eriksen René Lynge Reinhardt Carsten Bozhevolnyi Sergey I Chichkov Boris N |
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Affiliation: | Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany. a.b.evlyukhin@daad-alumni.de |
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Abstract: | Strong resonant light scattering by individual spherical Si nanoparticles is experimentally demonstrated, revealing pronounced resonances associated with the excitation of magnetic and electric modes in these nanoparticles. It is shown that the low-frequency resonance corresponds to the magnetic dipole excitation. Due to high permittivity, the magnetic dipole resonance is observed in the visible spectral range for Si nanoparticles with diameters of ~200 nm, thereby opening a way to the realization of isotropic optical metamaterials with strong magnetic responses in the visible region. |
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