Oscillator strengths of the intersubband electronic transitions in the hydrogenic nano-antidots

► We solve Schrodinger equation for QADs with donor impurity at the center. ► The oscillator strengths for the first two allowed transitions are thus obtained. ► The transitions to the first excited state are dominant for small antidot radii. ► For large antidot radii, the oscillator strengths tend to become comparable.