Heterostructures based on nitrides of group III elements: technical processes, properties, and light-emitting devices

摘要

Optical and magnetooptical data-recording and data-reading systems account for approximately 20% of the rapidly growing market for semiconductor lasers (6 billion dollars and 108% growth in the year 2000). Light-emitting devices with the smallest possible radiation wavelengths are required for fabricating these systems. Indeed, when CD-ROM devices using 780-nm radiation were replaced with 650-nm devices (DVD-ROM systems), the data-recording density was increased 20 times. A further decease in the wavelength of the semiconductor lasers will make it possible to record up to 150 Gbytes of data on a single compact disk.