Linear and Nonlinear Optical Properties of Well-Defined and Disordered Plasmonic Systems: A Review

摘要

Disordered metallic nanostructures have features that are not realized inwell-defined nanometallic counterparts, such as broadband light localizationand inhomogeneous refraction index at the nanoscale. Disordered metalsystems with a networked inner architecture have both particles and voidswith subwavelength dimensions which are randomly 3D organized in space.These disordered structures are benefited from high surface area and damagestability, permit guest materials permeability, and can be achieved in largescales employing less costs and expertise. Their abundant nanosize gaps andsharp tips can interact with incident light over a broadband range to generatea rich pattern of hot-spots and can therefore function as an artificial leaf,for example. Here, the linear and nonlinear optical properties of both welldefinedand disordered plasmonic structures are reviewed with a focus onlargescale 3D metallic networks. An efficiency comparison of those structuresas an optical source for second harmonic generation is presented as well.