Investigation of the elastic strain fields of hetero-epitaxial self-organized quantum dots

A systemic analysis about the elastic strain fields of tow-dimension lens shaped quantum dots is given in the finite element method by the ANSYS tool.In our analysis,three circumstances such as isolated quantum dot,multi-quantum dot and superlattice quantum dot systems are considered.Results showed the long-rang elastic fields of the substrate between the quantum dots would influence the strain fields of the materials in and around the quantum dot.So,in calculation the electronic structure of the multi quantum dots,the strain influences must be considered as a whole.