Terahertz Sources and SystemsRobert Miles, P. Harrison, D. Lippens Terahertz technology has moved on from being a useful but expensive circuit technique, applied largely in astronomy and space science, to become a subject in its own right, with important applications - terahertz imaging in particular. Indeed, the driving force in terahertz technology is currently imaging and spectroscopy. We now have the means to obtain images and chemical information in this frequency band. The images reproduced in this volume are striking and, not surprisingly, the clinical and analytical uses are the subject of intense activity. There is still, however, no complete range of active THz electronic components, but an encouraging conclusion of the book is that THz electronics will become necessary in communications systems in the foreseeable future. Terahertz technology has come of age, and the future lies open to new, exciting science and vital applications. |
Contents
TERAHERTZ DYNAMICS IN QUANTUM STRUCTURES | 3 |
SEMICONDUCTOR TERAHERTZ EMITTERS | 15 |
HIGH EFFICIENCY HBV MULTIPLIERS FOR MILLIMETRE WAVE GENERATION | 27 |
High Performance Heterestructure Barrier Varactors | 53 |
ACTIVE TWOTERMINAL DEVICES FOR TERAHERTZ POWER GENERATION BY MULTIPLICATION | 69 |
Farinfrared intersubband luminescence from quantum cascade sources | 89 |
Superlattice QC lasers towards the farinfrared | 101 |
Terahertz emission from semiconductor nanostructures | 115 |
TWODIMENSIONAL TERAHERTZ WAVE IMAGING | 225 |
THz IMAGING OF BIOLOGICAL SAMPLES | 241 |
TOWARDS TERAHERTZ COMMUNICATIONS SYSTEMS | 261 |
Towards Terahertz Communications Systems Requirements | 269 |
MICROMACHINING FOR TERAHERTZ CIRCUITS AMD SYSTEMS | 285 |
WIDEBAND TERAHERTZ SENSING AND SPECTROSCOPY WITH ELECTRONIC SOURCES AND DETECTORS | 301 |
TIMEDOMAIN TERAHERTZ SPECTROSCOPY AND SENSING | 315 |
TERAHERTZ TECHNOLOGY QUO VADIS? | 331 |
PERSPECTIVES OF CONTINUOUSWAVE OPTOELECTRONIC THZ IMAGING | 127 |
CONTINUOUSWAVE TERAHERTZ GENERATION USING PHOTOMIXERS | 145 |
EMERGING SOLID STATE TERAHERTZ ELECTRONICS | 169 |
PLASMA WAVE ELECTRONICS FOR TERAHERTZ APPLICATIONS | 187 |
PROSPECTS FOR THE APPLICATION OF MINIATURISED VACUUM TECHNOLOGIES TO TERAHERTZ SOURCES | 209 |
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Common terms and phrases
absorption amplitude antenna Appl applications array bandwidth bias bolometer capacitance cavity characteristic circuit coherent conduction current current density cw THz detection detector dielectric dipole doping dynamic efficiency electric field electron emission emitter energy fabricated far-infrared Figure Frequency GHz frequency multipliers frequency range GaAs gate harmonic HBV diode HEMT heterostructure heterostructure barrier varactor IEEE imaging system IMPATT InGaAs InP Gunn devices intersubband Klystron layer Lett measured metal micromachining Microwave Theory modulation near-field ohmic contact operation optical oscillators output power photoconductive photomixers photon photoresist Phys planar plasma waves quantum cascade quantum cascade lasers resistance resonant tunneling diode RF power levels sample Schottky diodes semiconductor Shur spatial resolution spectra structure substrate superlattice techniques temperature terahertz frequencies Terahertz Imaging terahertz radiation Terahertz Sources terahertz technology thickness THz beam THz imaging THz pulse THz radiation THz transmission transition tripler TUNNETT velocity voltage waveform waveguide wavelength