Multipole resonant light scattering properties of gold nanoshells

Summary form only given. Metal nanoshells, spherical dielectric nanoparticles coated with an ultrathin, homogeneous metallic layer, provide a concentric sphere scattering geometry which is ideal for the selective excitation of multipole plasmon resonances in metal nanostructures. In the metal nanoshell geometry, the plasmon resonance frequency is a sensitive function of the relative dimensions of the core and shell, and can be shifted hundreds of nanometers in wavelength from the plasmon resonance of the corresponding solid metal nanoparticle.