A sample containing self-assembled quantum dots (QDs) made from InP is to be grown on aGaAs substrate. Propose a semiconducting alloy that should be grown on top of GaAspreceding the

deposition of InP and then be used to cover the dots. The alloy should (i)allow self-assembly of InP QDs and (ii) form a type-l structure, where both electrons and holes will be confined in the InP QDs. Justify your answer.