Some Basic Facts on Semiconductors
Semiconductors have entered our everyday life to such a degree that the notion of a “silicon age” has been employed. Silicon is in fact the most important material as far as commercial applications of semiconductors are concerned. However, while silicon satisfies most of our current needs for electronics, it is only of limited use for optoelectronic applications. Semiconductor lasers, which are at the heart of compact disc players (present in most households), laser printers, and light modulators, the key to today’s telecommunication systems, require a direct band gap. Hence, many other semiconductor materials are subjects of current interest. Moreover, today’s scientists are no longer satisfied with the variety of bulk materials provided by nature, but have become artists who design semiconductor heterostructures and mesos-copic semiconductor devices corresponding to their needs and interests. This often results in surprising and quite remarkable material properties. Many of these structures, and their optical and transport properties will be discussed in this book.
KeywordsGaAs Gallium Arsenide HgTe
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