Coupling effect of quantum wells on band structure

The coupling effects of quantum wells on band structure are numerically investigated by using the Matlab programming language. In a one dimensional finite quantum well with the potential barrier V₀, the calculation is performed by increasing the number of inserted barriers with the same height V_b, and by, respectively, varying the thickness ratio of separated wells to inserted barriers and the height ratio of V_b to V₀. Our calculations show that coupling is strongly influenced by the above parameters of the inserted barriers and wells. When these variables change, the width of the energy bands and gaps can be tuned. Our investigation shows that it is possible for quantum wells to achieve the desired width of the bands and gaps.