Exciton-related energies of the 1s-like states of excitons in GaAs-Ga1−xAlxAs double quantum wells

► Study of 1s-like exciton states in double quantum wells. ► Binding energy decreases with the presence of second well. ► Binding energy of (2,2) state can be larger than (1,1) state. ► Central barrier can remove degeneracy of states. ► Anticrossing between states can be induced via symmetries.