Plasmon resonances in nanocomposites with degenerated electron gas of metal components and their demonstration in photonics of molecular hybrid systems

Abstract

The paper shows that the spectra of plasmon resonances of metal nanoparticles substantially depend on the degeneracy level of the metal electron gas. Based on the linearized equation of Thomas-Fermi, the author has obtained expressions for dipole dynamic polarizabilities of two-component spherical particles with a degenerated electron gas. The investigator separately has considered case of a two-particle cluster, which polarizability is represented by the tensor of the second rank. Frequency dependencies of main characteristics of composite particles in a quasi-static approximation have been calculated. The author shows some ways to generalize the model to account for retardation effects. The paper reports in what way will change radiation characteristics of molecules located near the nanocomposites of this type, including the case of development of processes of non-radiative energy transfer from electronically excited centers to quenching centers.