Abstract
A microscopic analysis of the mechanism of intraband radiation absorption by holes with their transition to a spin-split band for quantum wells based on stressed InGaAsP/InP quantum wells is performed within the framework of the four-band Kane model. The Kane’s equations are written and solved with taking into account nonsphericity of the kP Hamiltonian. It is shown that this process can be significant mechanism of internal radiation losses for quantum well lasers. It is shown that taking the nonsphericity and the elastic stresses into account leads to the absorption coefficient value decreasing. It is also shown that the maximum of the absorption coefficient is observed at values of the QW width from 40 to 60 A.
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