  A classical hydrodynamic approach is used to calculate the magnetoplasma
excitations of two vertically coupled electron dots. The electrons are confined
by different parabolic potentials in which case Kohn's theorem is no longer
valid. The equilibrium density profiles of the electrons in both dots are
calculated as function of the interdot distance. We find that for unequal
confinements of the two dots the electron density in one of the dots becomes
ring-like. The electron densities are then used to obtain the magnetoplasma
frequencies. The oscillator strengths are calculated, and we find that other
then the center of mass modes can be excited due to the electron-electron
interactions.
