III nitride ultraviolet emitters : technology and applications This book provides a comprehensive overview of the state of the art in group III nitride based ultraviolet LED and laser technologies covering different substrate approaches a review of optical electronic and structural properties of InAlGaN materials as well as various optoelectronic components. In addition the book gives an overview of a number of key application areas for UV emitters and detectors including water purification phototherapy sensing and UV curing. The book is written for researchers and graduate level students in the area of semiconductor materials optoelectronics and devices as well as developers and engineers in the various application fields of UV emitters and detectors