Theoretical And Experimental Research On The Compatibility Issues Of Heterogeneous Material For The Monolithic Integrated Optoelectronic Devices Applied In Communications

The research work of this doctoral thesis was mainly supported by the sub-project one "Theory on heterogeneous materials compatibility and Key structure & Technology Innovations for Monolithic Integrated Optoelectronic Devices " (Project No.2003CB314901), which belongs to the "Basic Research on Integrated Optoelectronic Devices and Microstructure Optical Fibers with Structure and Technology Innovations for Future Advanced Optical Communications", National Basic Research Program of China(Project No.2003CB314900), which Professor Ren Xiaomin is responsible for as a chief scientist. Additionally, Part of research was also assisted by the project "Material Technology Research on GaAs and InP-based Functional Tapered Structure and Applications in Novel Optoelectronic Devices" , the National Natural Science Foundation of China(Project No.90201035)Novel integrated optoelectronic devices are prerequisite to the evolution of the optical communications systems. And the major outstanding issues, which have been encountered with during the investigation of integrated optoelectronic devices, are compatibility of semiconductor materials, that of structures and that of processes. And how to realize the successful compatibility of heterogeneous semiconductors integration is the most important scientific issue. In this doctoral thesis, a great deal of research work has been done. That is mainly focused on the compatibility issues of large mismatched integrations of heterogeneous materials. Research results, as listed below, have been achieved.1. By the CASTEP software based on density-functional theory(DFT), the lattice constant,bulk model and band structure are systematically calcalated for BP, BAs, BSb in the periodic k-space. Plane wave pseudopotential are employed. Since the band gaps are highly underestimated by DFT...