Degradation defects in electron-beam-pumped Zn_(1-x)Cd_x/Se ZnSe graded-index separate-confinement heterostructure (GRINSCH) blue and blue-green lasers

摘要

Degradation defects induced by electron-beam bombardment in Zn- Cd Se/ZnSe(001) graded-index separate-confinement blue-green laser 1 x xstructures have been characterized by transmission electron microscopy. Most defects appear as tree-like arrangements of small extrinsic and intrinsic dislocation loops opening in 100 or 010 directions and are located within the quantum well or at its boundaries. The Burgers vectors of the loops were identified as b =1 011 and b =1101 for defects opening in the 100 and 2 2 010 directions respectively.