Magnetoplasmon excitations in quantum dot arrays

Motivated by the far-infrared transmission experiments of Demel et al., we have investigated the magnetoplasmon excitations in an array of quantum dots within the Thomas-Fermi-Dirac-von Weizsacker (TFDW) approximation. Detailed calculations of the magnetic dispersion acid power absorption from a uniform radiation field unambiguously demonstrates that the noncircular symmetry of the individual dots is responsible for the anticrossing behaviour observed in the experiments. The interdot Coulomb interaction is unimportant at the interdot separation of the samples studied. (C) 2000 Elsevier Science B.V. All rights reserved.