This research and reference text provides a comprehensive and authoritative survey of the state-of-the-art in terahertz electronics research Covering the fundamentals, operational principles, and theoretical aspects of the field, the book equips the reader to take the practical steps involved in the fabrication of devices that work in the terahertz frequency range. Volume two focuses on optical devices and their applications, providing a detailed discussion of bolometers, Golay cells, pyroelectric detectors, optical rectification and electro-optic effect-based components, photoconductive antennas, photomixers, quantum cascade and optically-pumped gas lasers. Applications of terahertz electronics in communication, spectroscopy and imaging are also described. Intended for researchers and professionals in the field, the text is an essential reference for anyone working at the cutting edge of terahertz electronics. Key Features: Provides a comprehensive review of the state-of-the-art in terahertz electronics research This volume covers photothermal methods, THz optoelectronics and applications in communications, imaging and spectroscopy Includes fundamentals, operational principles, theoretical aspects of devices and circuits, and advanced research Includes discussion sections and illustrative numerical problems Provides an up-to-date, cohesive text for researchers and professionals, and acts as valuable supplementary reading for electronic engineering students.