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The last research frontier in high frequency electronics now lies in the so-called THz (or submillimeter-wave) regime between the traditional microwave and infrared domains. Significant scientific and technical challenges within the terahertz (THz) frequency regime have recently motivated an array of new research activities. During the last few years, major research programs have emerged that are focused on advancing the state of the art in THz frequency electronic technology and on investigating novel applications of THz frequency sensing. This book serves as a detailed reference for the new

Infrared detectors. --- Microwave detectors. --- Submillimeter waves. --- Microwave devices. --- Electronic apparatus and appliances --- Microwaves --- Submillimeter radiation --- Submillimeter-terahertz radiation --- Terahertz radiation --- Waves, Submillimeter --- Electromagnetic waves --- Radiation --- Detectors, Microwave --- Detectors

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This work investigates the capability of the high-temperature superconductor YBCO to sense the evolution of the electrical field of THz pulses. A deposition process for ten unit-cell thin films and a sub-µm patterning process were developed to enable high sensitivities. The detector response to THz exctiations and its electrical-field sensitivity were studied. This unique characteristic allows for the investigation of instabilities of the THz radiation emitted from synchrotron storage rings.

electrical-field sensitivity --- E-Feld Sensitivität --- synchrotron --- terahertz radiation --- YBCO --- Dünnfilmabscheidung --- Synchrotron --- thin film deposition --- Terahertzstrahlung

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In the THz frequency range, superconducting detectors coupled to planar antennas are well suited for the use in the field of accelerator beam diagnostics. This work studies the coupling efficiency and spectral sensitivity of different antenna designs. Based on the conclusions, two different detector systems for spectroscopic measurements are developed and verified with measurements at accelerator-based light sources.

Electrical engineering --- Supraleitung --- THz-Detektoren --- Terahertzstrahlung --- Planarantennen --- Synchrotronstrahlung --- superconductivity --- terahertz detector --- terahertz radiation --- planar antennas --- synchrotron radiation

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This book covers the latest advances in the techniques employed to manage the THz radiation and its potential uses. It has been subdivided in three sections: THz Detectors, THz Sources, Systems and Applications. These three sections will allow the reader to be introduced in a logical way to the physics problems of sensing and generation of the terahertz radiation, the implementation of these devices into systems including other components and finally the exploitation of the equipment for real applications in some different field. All of the sections and chapters can be individually addressed in order to deepen the understanding of a single topic without the need to read the whole book. The THz Detectors section will address the latest developments in detection devices based on three different physical principles: photodetection, thermal power detection, rectification. The THz Sources section will describe three completely different generation methods, operating in three separate scales: quantum cascade lasers, free electron lasers and non-linear optical generation. The Systems and Applications section will take care of introducing many of the aspects needed to move from a device to an equipment perspective: control of terahertz radiation, its use in imaging or in spectroscopy, potential uses in security, and will address also safety issues. The text book is at a level appropriate to graduate level courses up to researchers in the field who require a reference book covering all aspects of terahertz technology.

Physics. --- Microwaves. --- Optical materials. --- Applied and Technical Physics. --- Microwaves, RF and Optical Engineering. --- Optics, Optoelectronics, Plasmonics and Optical Devices. --- Optical and Electronic Materials. --- Atomic/Molecular Structure and Spectra. --- Physics --- Physical Sciences & Mathematics --- Physics - General --- Optics --- Hertzian waves --- Natural philosophy --- Philosophy, Natural --- Materials --- Atomic structure. --- Molecular structure. --- Spectra. --- Optical engineering. --- Electronic materials. --- Optics, Lasers, Photonics, Optical Devices. --- Terahertz technology. --- Submillimeter waves. --- Electromagnetic waves. --- Electromagnetic energy --- Electromagnetic radiation --- Electromagnetic theory --- Waves --- Submillimeter radiation --- Submillimeter-terahertz radiation --- Terahertz radiation --- Waves, Submillimeter --- Electromagnetic waves --- Radiation --- High technology --- Electromagnetic devices --- Electric waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Lasers. --- Photonics. --- Atomic structure  . --- Molecular structure . --- Physical sciences --- Dynamics --- Mechanical engineering --- Structure, Molecular --- Chemical structure --- Structural bioinformatics --- Structure, Atomic --- Atomic theory --- Electronic materials --- New optics --- Light amplification by stimulated emission of radiation --- Masers, Optical --- Optical masers --- Light amplifiers --- Light sources --- Optoelectronic devices --- Nonlinear optics --- Optical parametric oscillators

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This book covers terahertz antenna technology for imaging and sensing, along with its various applications. The authors discuss the use of terahertz frequency and photoconductive antenna technology for imaging applications, such as biological and bio-medical applications, non-destructive inspection of fabrics and plastics, analysis of hydration levels or detecting the presence of metallic components in samples, and detecting a variety of materials with unique spectral fingerprints in the terahertz frequency range, such as different types of explosives or several compounds used in the fabrication of medicines. Provides a comprehensive review of terahertz source and detector for imaging and sensing; Discusses photoconductive antenna technology for imaging and sensing; Presents modalities for improving the photoconductive dipole antenna performance for imaging and sensing; Explores applications in tomographic imaging, art conservation and the pharmaceutical and aerospace industries.

Electronic circuits. --- Computer engineering. --- Internet of things. --- Embedded computer systems. --- Signal processing. --- Image processing. --- Speech processing systems. --- Circuits and Systems. --- Cyber-physical systems, IoT. --- Signal, Image and Speech Processing. --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Embedded systems (Computer systems) --- Computer systems --- Architecture Analysis and Design Language --- IoT (Computer networks) --- Things, Internet of --- Computer networks --- Embedded Internet devices --- Machine-to-machine communications --- Computers --- Electron-tube circuits --- Electric circuits --- Electron tubes --- Electronics --- Design and construction --- Terahertz technology. --- Submillimeter waves. --- Submillimeter radiation --- Submillimeter-terahertz radiation --- Terahertz radiation --- Waves, Submillimeter --- Electromagnetic waves --- Radiation --- High technology --- Electromagnetic devices