Physics of Semiconductors and Their Heterostructures addresses the structural, electronic, transport, and optoelectronic properties of modern semiconductor systems. The book discusses important semiconductor systems, new physical phenomena (band engineering, strained effects, velocity overshoot, quantum confined Stark effect, etc.), and their relation to current modern devices. To increase readers' understanding of the subject matter, simple concepts are first developed and then increasing levels of detail are introduced; making the book suitable for varying levels of graduate courses in electrical engineering and applied physics curricula.