SEMICONDUCTOR DEVICE INCLUDING QUANTUM DOTS, ITS FABRICATING METHOD AND SEMICONDUCTOR LASER

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor device in which injection efficiency of carriers into quantum dots can be prevented from lowering. SOLUTION: A plurality of quantum dots are distributed discretely on the major surface of a substrate comprising a first semiconductor. A coating layer comprising a second semiconductor is formed on an imaginary plane where the quantum dots are distributed. A barrier layer is disposed at least partially in a region of imaginary plane where the quantum dots are not arranged. The barrier layer is formed of a third semiconductor or insulating material having a band gap larger that that of the first and second semiconductors.