Plasmon excitations in quasi-one dimensional atomic wires

  • Dipartimento di Fisica - Aula 501
  • Seminario

Relatori

Prof. Herbert Pfnuer
Universitaet Hannover

Dettagli

Plasmons in low-dimensional systems respresent an important tool for coupling energy into nanostructures and the localization of energy on the scale of only a few nanometers. Contrary to ordinary surface plasmons of metallic bulk materials, their dispersion goes to zero in the long wavelength limit, thus covering a broad range of energies from terahertz to near infrared, and from mesoscopic wavelengths down to just a few nanometers.

Here we concentrate on the smallest possible conductors that are only one atom high and go down to the limit of atomic chains that are one or two atoms wide and show how both plasmon dispersions and bandstructures and be modified by varying materials, step distances and step properties.