Photoluminescence of tetrahedral quantum-dot quantum wells
  Taking into account the tetrahedral shape of a quantum dot quantum well (QDQW) when describing excitonic states, phonon modes and the exciton-phonon interaction in the structure, we obtain within a non-adiabatic approach a quantitative interpretation of the photoluminescence (PL) spectrum of a single CdS/HgS/CdS QDQW. We find that the exciton ground state in a tetrahedral QDQW is bright, in contrast to the dark ground state for a spherical QDQW. 
V. A. Fonoberov (1), E. P. Pokatilov (2), V. M. Fomin (3) and J. T.   Devreese (3) ((1) Nano-Device Laboratory, University o...