Download or read book Quasioptical Systems Components for Terahertz Astronomy written by Dathon R. Golish and published by . This book was released on 2008 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past two decades, submillimeter and terahertz astronomy has grown rapidly and become an important new window for studying the universe. This growth has been enabled by the confluence of several technologies which make the design and fabrication of high frequency single and multi-pixel heterodyne receivers possible. This dissertation reviews the development of a new generation of terahertz instrumentation at the University of Arizona, with specific emphasis on their optical components and systems. These instruments include several receivers for the Antarctic Submillimeter Telescope and Remote Observatory (formerly installed at the South Pole), including a dual-frequency 492/810 GHz receiver called Wanda, a 4-pixel 810 GHz heterodyne array called PoleSTAR, and a 1.5 THz receiver called TREND. It also covers receivers for the Heinrich Hertz Submillimeter Telescope on Mt. Graham in southern Arizona. These receivers include a 7-pixel 345 GHz heterodyne array called DesertSTAR, a 64-pixel polarimeter/bolometer system called Hertz, and a 64-pixel 345 GHz heterodyne array called SuperCam. After reviewing these instruments, concepts for the next generation of arrays and terahertz telescopes designed for the high Atacama desert, Antarctica, high altitude balloon missions, and orbiting observatories will be presented. This dissertation will also cover other contributions made to terahertz astronomy, including the creation of a Gaussian beam propagation program to help design terahertz optical systems and an integrated optics design for a waveguide interferometer to be used as an alternative to traditional bulk optics systems.
Download or read book Terahertz Astronomy written by Christopher K. Walker and published by CRC Press. This book was released on 2015-10-16 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Powerful Window into Cosmic EvolutionTerahertz (THz) observations of interstellar atoms, molecules, and dust serve as powerful probes of the conditions within the interstellar medium that permeates our galaxy, providing insights into the origins of stars, planets, galaxies, and the Universe. Taking a cross-disciplinary approach to the subject, Te
Download or read book New Directions in Terahertz Technology written by J.M. Chamberlain and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed study of the science, engineering and applications of terahertz technology, based on room-temperature solid-state devices, which are seen as the key technology for wider applications in this frequency range. The relative merits of electronic and optical devices are discussed and new device principles identified. Issues of terahertz circuit design, implementation and measurement are complemented by chapters on current and future applications in communications, sensing and remote surveillance. Audience: The unique coverage of all aspects of terahertz technology will appeal to both new and established workers in the field, as well as providing a survey for the interested reader.
Download or read book Heterodyne Arrays for Terahertz Astronomy written by Jenna Lynn Kloosterman and published by . This book was released on 2014 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The clouds of gas and dust that constitute the Interstellar Medium (ISM) within the Milky Way and other galaxies can be studied through the spectral lines of the atoms and molecules. The ISM follows a lifecycle in which each of its phases can be traced through spectral lines in the Terahertz (THz) portion of the electromagnetic spectrum, loosely defined as 0.3 - 3 THz. Using the high spectral resolution afforded by heterodyne instruments, astronomers can potentially disentangle the large-scale structure and kinematics within these clouds. In order to study the ISM over large size scales, large format THz heterodyne arrays are needed. The research presented in this dissertation focuses on the development of two heterodyne array receiver systems for ISM studies, SuperCam and a Super-THz (>3 THz) receiver. SuperCam is a 64-pixel heterodyne imaging array designed for use on ground-based submillimeter telescopes to observe the astrophysically important CO J=3-2 emission line at 345 GHz. The SuperCam focal plane stacks eight, 1x8 mixer subarrays. Each pixel in the array has its own integrated superconductor-insulator-superconductor (SIS) mixer and Low Noise Amplifier (LNA). In spring 2012, SuperCam was installed on the University of Arizona Submillimeter Telescope (SMT) for its first engineering run with 32 active pixels. A second observing run in May 2013 had 52 active pixels. With the outliers removed, the median double sideband receiver temperature was 104 K. The Super-THz receiver is designed to observe the astrophysically important neutral atomic oxygen line at 4.7448 THz. The local oscillator is a third-order distributed feedback Quantum Cascade Laser operating in continuous wave mode at 4.741 THz. A quasi-optical hot electron bolometer is used as the mixer. We record a double sideband receiver noise temperature of 815 K, which is ~7 times the quantum noise limit and an Allan variance time of 15 seconds at an effective noise fluctuation bandwidth of 18 MHz. Heterodyne performance is confirmed by measuring a methanol line spectrum. By combining knowledge of large array formats from SuperCam and quasi-optical mixers, initial tests and designs are presented to expand the single pixel 4.7 THz receiver into a quasi-optical 16-pixel array.
Download or read book Analysis of Quasi optical Components for Far infrared Astronomy written by Paul Kelly and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Semiconductor TeraHertz Technology written by Guillermo Carpintero and published by John Wiley & Sons. This book was released on 2015-07-14 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Key advances in Semiconductor Terahertz (THz) Technology now promises important new applications enabling scientists and engineers to overcome the challenges of accessing the so-called "terahertz gap". This pioneering reference explains the fundamental methods and surveys innovative techniques in the generation, detection and processing of THz waves with solid-state devices, as well as illustrating their potential applications in security and telecommunications, among other fields. With contributions from leading experts, Semiconductor Terahertz Technology: Devices and Systems at Room Temperature Operation comprehensively and systematically covers semiconductor-based room temperature operating sources such as photomixers, THz antennas, radiation concepts and THz propagation as well as room-temperature operating THz detectors. The second part of the book focuses on applications such as the latest photonic and electronic THz systems as well as emerging THz technologies including: whispering gallery resonators, liquid crystals, metamaterials and graphene-based devices. This book will provide support for practicing researchers and professionals and will be an indispensable reference to graduate students in the field of THz technology. Key features: Includes crucial theoretical background sections to photomixers, photoconductive switches and electronic THz generation & detection. Provides an extensive overview of semiconductor-based THz sources and applications. Discusses vital technologies for affordable THz applications. Supports teaching and studying increasingly popular courses on semiconductor THz technology.
Download or read book Design and Analysis of Quasioptical Components for Use in Terahertz Optics and Future Cmb Missions written by David Byrne and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization and Design of Optical Systems and Components in the Terahertz Range written by Philipp Fürholz and published by . This book was released on 2009 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Analysis of Quasioptical Components for Use in Astronomical Telescopes written by Rory Eoin Sheridan and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terahertz Sensing Technology written by William R. Loerop and published by World Scientific. This book was released on 2003 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last research frontier in high frequency electronics lies in the so-called terahertz (or submillimeter wave) regime, between the traditional microwave and the 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 provides a detailed review of the new THz frequency technological developments that are emerging across a wide spectrum of sensing and technology areas. Volume II presents cutting edge results in two primary areas: (1) research that is attempting to establish THz-frequency sensing as a new characterization tool for chemical, biological and semiconductor materials, and (2) theoretical and experimental efforts to define new device concepts within the OC THz gapOCO. Contents: THz-Frequency Spectroscopic Sensing of DNA and Related Biological Materials (T Globus et al.); Spectroscopy with Electronic Terahertz Techniques for Chemical and Biological Sensing (M K Choi et al.); Terahertz Applications to Biomolecular Sensing (A G Markelz & S E Whitmire); Characteristics of Nano-Scale Composites at THz and IR Spectral Regions (J F Federici & H Grebel); Fundamentals of Terrestrial Millimeter-Wave and THz Remote Sensing (E R Brown); Terahertz Emission Using Quantum Dots and Microcavities (G S Solomon et al.); Terahertz Transport in Semiconductor Quantum Structures (S J Allen & J S Scott); Advanced Theory of Instability in Tunneling Nanostructures (D L Woolard et al.); Wigner Function Simulations of Quantum DeviceOCoCircuits Interactions (H L Grubin & R C Buggeln); Continuous-Wave Terahertz Spectroscopy of Plasmas and Biomolecules (D F Plusquellic et al.). Readership: Undergraduates, graduate students, academics and researchers in engineering and science."
Download or read book Quasioptical Systems written by Goldsmith and published by Springer. This book was released on 1998-02-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining a general introduction to Gaussian beams and quasioptical propagation with practical applications, Quasioptical Systems provides a state-of-the-art treatment of the design of low-loss, broadband systems at microwave to submillimeter wavelengths. The approach presented involves utilizing a beam with a Gaussian distribution of field strength perpendicular to its axis, which in turn propagates in a simple, predictable fashion.
Download or read book Design Analysis and Optimisation of Quasi optical Systems for Sub mm Astronomy Instrumentation written by Massimo Candotti and published by . This book was released on 2007 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quasioptical Systems written by Paul F. Goldsmith and published by . This book was released on 1998 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing commercial use of millimeter wavelengths for remote sensing, communications, and radar systems has driven the need for new low-cost, high performance systems, and with it, the need for quasioptical systems.Combining a general introduction to Gaussian beams and quasioptical propagation with practical applications, QUASIOPTICAL SYSTEMS provides a state-of-the-art treatment of the design of low-loss, broadband systems at microwave to submillimeter wavelegnths. the approach presented involved utilizing a beam with a Gaussian distribution of field strength perpendicular to its axis, which in turn propagates in a simple predictable fashion. Features include: A Convenient summary of Gaussian beam propagation formulas; Extensive coverage of present-day quasioptical components and their performance; In-depth coverage of dielectric material uses at millimeter and submillimeter wavelengths; An analysis of lenses and mirrors together with design techniques; and much more!This book will be of key interest to systems designers, antenna engineers, communications systems engineers, and researchers.
Download or read book Terahertz Sensing Technology Vol 2 Emerging Scientific Applications And Novel Device Concepts written by Michael S Shur and published by World Scientific. This book was released on 2004-02-06 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last research frontier in high frequency electronics lies in the so-called terahertz (or submillimeter wave) regime, between the traditional microwave and the 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 provides a detailed review of the new THz frequency technological developments that are emerging across a wide spectrum of sensing and technology areas.Volume II presents cutting edge results in two primary areas: (1) research that is attempting to establish THz-frequency sensing as a new characterization tool for chemical, biological and semiconductor materials, and (2) theoretical and experimental efforts to define new device concepts within the “THz gap”.
Download or read book Terahertz Sensing Technology Vol 1 Electronic Devices And Advanced Systems Technology written by Michael S Shur and published by World Scientific. This book was released on 2003-07-14 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 THz frequency technological advances that are emerging across a wide spectrum of sensing and technology areas.
Download or read book Passive Millimetre wave and Terahertz Imaging and Technology written by Roger Appleby and published by SPIE-International Society for Optical Engineering. This book was released on 2004 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
