Demonstration of Magnetic Dipole Resonances of Dielectric Nanospheres in the Visible Region

作者：Andrey B. Evlyukhin, Sergey M. Novikov, Urs Zywietz, René Lynge Eriksen, Carsten Reinhardt, Sergey I. Bozhevolnyi, Boris N. Chichkov · 发表于：Nano Letters · 年份：2012 · DOI：10.1021/nl301594s · 被引用次数：1020 · 研究领域：Metamaterials and Metasurfaces Applications、Plasmonic and Surface Plasmon Research、Photonic Crystals and Applications

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.