Effect of size modulation and donor position on intersubbands refractive index changes of a donor within a spherical core/shell/shell semiconductor quantum dot

In the current study, linear, nonlinear and total relative refractive index changes of a single shallow hydrogenic donor atom confined in semiconductor core/shell/shell quantum dot heterostructure are investigated detail by compact density matrix formalism. For this purpose, energy eigenvalues corresponding wave functions calculated diagonalization method effective mass approximation. Then, intersubband 1s→1p 1p→1d transition energies calculated. effects core/shell sizes, position depth confinement potential analyzed. The numerical results show that linear undergo significant changes.