Hongxing Jiang is a Professor in the Department of Physics, Kansas State University, Manhattan, Kansas.Omar Manasreh, is a Professor in the Department of Electrical & Computer Engineering, at The University of New Mexico, Albuquerque, New Mexico. He is also the editor of the Optoelectronic Properties ofSemiconductors and Superlattices series.

• Chapter One: Optical Spectroscopy of Highly Excited Group III-NitridesChapter Two: Optical Constraints of III-Nitrides-ExperimentsChapter Three: Optical Functions of III-Nitrides-CalculationsChapter Four: Interband Optical Transitions in Piezo-Strained InGaN Qunatum WellsChapter Five: Electric Fields in Polarized InGaN/GaN HeterostructuresChapter Six: Inter-link Between Structural and Optical Properties of GaN and GaN/AIGaN HeterostructuresChapter Seven: LO Phonon Assisted Excition Luminescence Processes in Heteroepitaxial GaN FilmsChapter Eight: Cubic Phase GaN and AIGaN: Expitaxial Growth and Optical Properties