The dependence of the surface morphology and the interface misfit dislocation density on the amount of lattice mismatch varies considerably with the composition of the quaternary material in the 1.15-1.31-μm band-gap range. For the same amount of lattice mismatch the surface morphology becomes poorer for the longer-wavelength material, and this causes melt removal problems in the LPE growth unless the lattice mismatch is less than 0.09%. For the growth of 1.31-μm band-gap material of good crystallographic quality, it is essential that the lattice mismatch be less than 0.03%.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)