This course introduces the students to the field of Semiconductor Optoelectronics, which deals with the physics and technology of semiconductor optoelectronic devices such as light emitting diodes, laser diodes and photodiodes, which are becoming important components in consumer optoelectronics, IT and communication devices, and in industrial instrumentation. Assuming a general science/engineering undergraduate level background, the course begins with a recap of essential (to this course) semiconductor physics, followed by the study of interaction of photons with electrons and holes in a semiconductor, leading to the realization of semiconductor photon amplifiers, sources, modulators, and detectors. A variety of designs and configurations of these devices have been emerging with application-specific characteristics. The course is ‘applied’ in nature, and could be offered at the level of B.E/B.Tech IIIrd/ IVth Year, M.Sc IInd/ M.Tech. I Year.
Week 1 : Introduction, Energy bands in solids, Density of states Week 2 : Occupation probability and Carrier concentration, Quasi Fermi levels Week 3 : Semiconductor optoelectronic materials and Heterostructures Week 4 : Heterostructure p-n junctions, Schottky junctions, Ohmic contacts Week 5 : Interaction of photons with electrons and holes in a semiconductor Week 6 : Amplification by stimulated emission, The semiconductor laser amplifier Week 7 : Absorption in semiconductors and quantum wells, Electro-absorption modulator Week 8 : Injection electroluminescence, Light emitting diode and their characteristics Week 9 : Semiconductor laser: Device structure and characteristics Week 10 : Single frequency lasers, VCSEL and Quantum well lasers Week 11 : Semiconductor photodetectors, General characteristics Week 12 : Photodiodes: PIN diode and APD. Photonic Integrated Circuits