Study of electron-related intersubband optical properties in three coupled quantum wells wires with triangular transversal section

This work concerns theoretical study of confined electrons in a low-dimensional structure consisting of three coupled triangular GaAs/Al_xGa_1-xAs quantum wires. Calculations have been made in the effective mass and parabolic band approximations. In the calculations a diagonalization method to find the eigenfunctions and eigenvalues of the Hamiltonian was used. A comparative analysis of linear and nonlinear optical absorption coefficients and the relative change in the refractive index was made, which is tied to the intersubband electron transitions.