Optical absorption coefficient of non-concentric spherical core-shell quantum dot

This work calculates the optical absorption coefficient of a spherically non-concentric core-shell quantum dot, induced by interband transitions. The effective mass method and a model of rectangular potential wells and barriers are applied. The solution of the Schrödinger equation is obtained using the plane wave method. Dependencies of the absorption coefficient on the non-concentricity parameter are determined. The influence of the distribution of quantum dots by the degree of non-concentricity on optical absorption is considered. Theoretical results show the optical absorption dependence on the non-concentricity parameter. The obtained results are consistent with experimental data. •The model of non-concentric spherical core-shell quantum dot has been proposed.•The light absorption dependence of on the non-concentricity parameter has been analyzed.•The half-width of the absorption band has been defined with regard distribution of quantum dots by the core position.