We study experimentally both magnetic and electric optically induced resonances of silicon
nanoparticles by combining polarization-resolved dark-field spectroscopy and near-field scanning
optical microscopy measurements. We reveal that the scattering spectra exhibit strong sensitivity
of electric dipole response to the probing beam polarization and attribute the characteristic asymmetry
of measured near-field patterns to the excitation of a magnetic dipole mode. The proposed
experimental approach can serve as a powerful tool for the study of photonic nanostructures possessing
both electric and magnetic optical responses.
Copyright (2015) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 106, 171110 (2015) and may be found at http://dx.doi.org/10.1063/1.4919536.