Magneto-optics in a square-well quantum dot

We calculate the optical transition coefficient of two electrons confined in a square-well quantum dot under a magnetic field. We determined that there are many different types of absorption, some induced when interacting electrons are under a magnetic field. As the magnetic field becomes strong, a spin-singlet–spin-triplet transition of the ground state occurs, resulting in a drastic change in optical transition spectra. In a strong magnetic field, an optical transition with double the cyclotron frequency is induced by electron-electron interaction and the confining potential. © 1996 The American Physical Society.