LAUSR

Abstract In this work, we investigated the effects of polarizations and structural parameters on the optical absorption coefficient (OAC) and the intersubband transition between the three lowest energy levels E 1 , E 2 , and E 3 in the MgxZn(1−x)O/ZnO single quantum well. The energy of the electron in each level and its respective wavefunction are calculated by the numerical solution of Schrodinger and Poisson equations self-consistently using an effective mass approximation. Our findings exhibit that the intersubband transitions, Δ E 12 and Δ E 13 , can be altered and controlled by varying the quantum well width and the magnesium composition, x. Moreover, our results suggest that the optical absorption coefficients, α 12 and α 13 , can be modulated principally by adjusting the quantum well width, especially the optical absorption coefficient ( α 12 ), which presents a red shift by raising the quantum well thickness. Contrary to α 12 , the optical absorption coefficient, α 13 , can present either a red or a blue shift by increasing the quantum well width. The process responsible for this behavior, which can be suitable for optoelectronic device applications, is discussed here in detail.