@Article{ACSNano_5_6586, author = {S. M{\"u}hlig and A. Cunningham and S. Scheeler and C. Pacholski and T. B{\"u}rgi and C. Rockstuhl and F. Lederer}, title = {{Self-Assembled Plasmonic Core-Shell Clusters with an Isotropic Magnetic Dipole Response in the Visible Range}}, journal= {ACS Nano}, ISSN = {1936-0851}, volume= {5}, number= {8}, pages = {6586-6592}, url = {http://pubs.acs.org/doi/abs/10.1021/nn201969h}, eprint= {http://www.unige.ch/sciences/chifi/publis/refs_pdf/ref01244.pdf}, doi= {10.1021/nn201969h}, abstract = {{We theoretically analyze, fabricate, and characterize a three-dimensional plasmonic nanostructure that exhibits a strong and isotropic magnetic response in the visible spectral domain. Using two different bottom-up approaches that rely on self-organization and colloidal nanochemistry, we fabricate clusters consisting of dielectric core spheres, which are smaller than the wavelength of the incident radiation and are decorated by a large number of metallic nanospheres. Hence, despite having a complicated inner geometry, such a core{\frac{ }{ }}shell particle is sufficiently small to be perceived as an individual object in the far field. The optical properties of such complex plasmonic core{\frac{ }{ }}shell particles are discussed for two different core diameters.}}, year = {2011} }