Infrared and Millimeter Waves is a series of books that compiles the work of several authors, with each volume focusing on certain aspect of infrared and millimeter waves, such as sources of radiation, instrumentation, and millimeter systems. This is particularly related to systems and components. Consisting of six chapters, the book first offers a review of infrared and submillimeter spectroscopy of the atmosphere. The next chapter provides a comprehensive coverage of interferometric spectrometers. Chapter three discusses general principles of infrared detectors, treatment of photon detectors, bolometers, and coherent detectors. The fourth chapter discusses the use of metal-semiconductor junctions as frequency converters. Next, the book reviews quasi-optical techniques at millimeter and submillimeter wavelengths. The last chapter tackles far-infrared and submillimeter-wavelength filters. This book will be of great use to researchers and professionals whose work involves infrared and millimeter waves.

IR and THz technologies are widely used in security screening and surveillance, astronomy, spectroscopy, biomedicine, food and package inspection, detection of concealed weapons, vision through camouflage, etc. There are increasing demands for the fast transmission of large amounts of data. THz radiation penetrates dielectric materials like plastics, ceramics or cardboard allowing contact-free testing. Medical imaging technologies can provide guidance for surgeons in delimiting the margins of tumors, help clinicians to visualize diseased areas, etc. Keywords: THz and IR Detectors, THz and IR Sources, Superconducting Photon Detectors, Superconducting THz Detectors, Graphene-based Detectors, THz Sensors with Metamaterials, Photoconductive Antenna Detectors, Imaging, Communication, Spectroscopy, Sensing, Security Screening, Surveillance, Astronomy, Biomedicine, Food Inspection, Package Inspection, Concealed Weapons Detection, Transmission of Large Amounts of Data, Non-destructive Testing, Contact-free Testing, Medical Imaging Technologies.