ELECTRONIC-STRUCTURE AND OPTICAL-PROPERTIES OF COUPLED QUANTUM DOTS

We calculate the electronic structure of quantum dots coupled along th e growth direction with one or two electrons in magnetic fields. We ex amine the spin transitions of the ground states and the optical transi tions between the energy levels, which are associated with far-infrare d absorption. Because of the dot-dot and electron-electron interaction s, the coupled quantum dots exhibit rich electronic structures. We sug gest that the effects of these interactions on the energy spectra are observable by optical measurements because the transition energies exh ibit discontinuous changes for a vertically polarized light as the mag netic field increases.