Relevant bibliographies by topics / Sub-THz

Academic literature on the topic 'Sub-THz'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Sub-THz"

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Scalari, G., C. Walther, M. Fischer, R. Terazzi, H. Beere, D. Ritchie, and J. Faist. "THz and sub-THz quantum cascade lasers." Laser & Photonics Review 3, no. 1-2 (February 24, 2009): 45–66. http://dx.doi.org/10.1002/lpor.200810030.

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Kumar, Nitin, Udaybir Singh, Anirban Bera, and A. K. Sinha. "A review on the sub-THz/THz gyrotrons." Infrared Physics & Technology 76 (May 2016): 38–51. http://dx.doi.org/10.1016/j.infrared.2016.01.015.

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Ma, He, Yu Wang, Rong Lu, Fangrui Tan, Yulan Fu, Guang Wang, Dayong Wang, et al. "A flexible, multifunctional, active terahertz modulator with an ultra-low triggering threshold." Journal of Materials Chemistry C 8, no. 30 (2020): 10213–20. http://dx.doi.org/10.1039/d0tc02446e.

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Flexible, multifunctional, active THz modulators with ultra-low triggering threshold were developed by aligned carbon nanotube thin films coated with VO2. These active THz modulators find applications in THz communication and THz imaging.
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Saha, Bishwadeep, Sebastien Fregonese, Anjan Chakravorty, Soumya Ranjan Panda, and Thomas Zimmer. "Sub-THz and THz SiGe HBT Electrical Compact Modeling." Electronics 10, no. 12 (June 10, 2021): 1397. http://dx.doi.org/10.3390/electronics10121397.

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From the perspectives of characterized data, calibrated TCAD simulations and compact modeling, we present a deeper investigation of the very high frequency behavior of state-of-the-art sub-THz silicon germanium heterojunction bipolar transistors (SiGe HBTs) fabricated with 55-nm BiCMOS process technology from STMicroelectronics. The TCAD simulation platform is appropriately calibrated with the measurements in order to aid the extraction of a few selected high-frequency (HF) parameters of the state-of-the-art compact model HICUM, which are otherwise difficult to extract from traditionally prepared test-structures. Physics-based strategies of extracting the HF parameters are elaborately presented followed by a sensitivity study to see the effects of the variations of HF parameters on certain frequency-dependent characteristics until 500 GHz. Finally, the deployed HICUM model is evaluated against the measured s-parameters of the investigated SiGe HBT until 500 GHz.
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Sizov, Fiodor F., Vladimir P. Reva, Alexandr G. Golenkov, and Vyacheslav V. Zabudsky. "Uncooled Detectors Challenges for THz/sub-THz Arrays Imaging." Journal of Infrared, Millimeter, and Terahertz Waves 32, no. 10 (April 13, 2011): 1192–206. http://dx.doi.org/10.1007/s10762-011-9789-2.

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Sakhno, M., F. Sizov, and A. Golenkov. "Uncooled THz/sub-THz Rectifying Detectors: FET vs. SBD." Journal of Infrared, Millimeter, and Terahertz Waves 34, no. 12 (September 8, 2013): 798–814. http://dx.doi.org/10.1007/s10762-013-0023-2.

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Formisano, F., R. M. Dubrovin, R. V. Pisarev, A. M. Kalashnikova, and A. V. Kimel. "Laser-induced THz magnetism of antiferromagnetic CoF2." Journal of Physics: Condensed Matter 34, no. 22 (March 30, 2022): 225801. http://dx.doi.org/10.1088/1361-648x/ac5c20.

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Abstract Excitation, detection, and control of coherent THz magnetic excitation in antiferromagnets are challenging problems that can be addressed using ever shorter laser pulses. We study experimentally excitation of magnetic dynamics at THz frequencies in an antiferromagnetic insulator CoF2 by sub-10 fs laser pulses. Time-resolved pump-probe polarimetric measurements at different temperatures and probe polarizations reveal laser-induced transient circular birefringence oscillating at the frequency of 7.45 THz and present below the Néel temperature. The THz oscillations of circular birefringence are ascribed to oscillations of the magnetic moments of Co2+ ions induced by the laser-driven coherent E g phonon mode via the THz analogue of the transverse piezomagnetic effect. It is also shown that the same pulse launches coherent oscillations of the magnetic linear birefringence at the frequency of 3.4 THz corresponding to the two-magnon mode. Analysis of the probe polarization dependence of the transient magnetic linear birefringence at the frequency of the two-magnon mode enables identifying its symmetry.
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Ioppolo, S., B. A. McGuire, M. A. Allodi, and G. A. Blake. "THz and mid-IR spectroscopy of interstellar ice analogs: methyl and carboxylic acid groups." Faraday Discuss. 168 (2014): 461–84. http://dx.doi.org/10.1039/c3fd00154g.

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A fundamental problem in astrochemistry concerns the synthesis and survival of complex organic molecules (COMs) throughout the process of star and planet formation. While it is generally accepted that most complex molecules and prebiotic species form in the solid phase on icy grain particles, a complete understanding of the formation pathways is still largely lacking. To take full advantage of the enormous number of available THz observations (e.g.,Herschel Space Observatory, SOFIA, and ALMA), laboratory analogs must be studied systematically. Here, we present the THz (0.3–7.5 THz; 10–250 cm−1) and mid–IR (400–4000 cm−1) spectra of astrophysically-relevant species that share the same functional groups, including formic acid (HCOOH) and acetic acid (CH3COOH), and acetaldehyde (CH3CHO) and acetone ((CH3)2CO), compared to more abundant interstellar molecules such as water (H2O), methanol (CH3OH), and carbon monoxide (CO). A suite of pure and mixed binary ices are discussed. The effects on the spectra due to the composition and the structure of the ice at different temperatures are shown. Our results demonstrate that THz spectra are sensitive to reversible and irreversible transformations within the ice caused by thermal processing, suggesting that THz spectra can be used to study the composition, structure, and thermal history of interstellar ices. Moreover, the THz spectrum of an individual species depends on the functional group(s) within that molecule. Thus, future THz studies of different functional groups will help in characterizing the chemistry and physics of the interstellar medium (ISM).
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Cabbia, Marco, Chandan Yadav, Marina Deng, Sebastien Fregonese, Magali De Matos, and Thomas Zimmer. "Silicon Test Structures Design for Sub-THz and THz Measurements." IEEE Transactions on Electron Devices 67, no. 12 (December 2020): 5639–45. http://dx.doi.org/10.1109/ted.2020.3031575.

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Lysiuk, I. O., A. G. Golenkov, S. E. Dukhnin, V. P. Reva, A. V. Shevchik-Shekera, and F. F. Sizov. "SUB-THz/THz RADIATION DETECTOR DEVICE BASED ON Si-MOSFET." Sensor Electronics and Microsystem Technologies 14, no. 3 (October 4, 2017): 38–46. http://dx.doi.org/10.18524/1815-7459.2017.3.109330.

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Dissertations / Theses on the topic "Sub-THz"

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Tsiatmas, Anagnostis. "Novel approaches in manipulating, guiding, and generating THz and sub-THz fields." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/359886/.

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This thesis serves to address the main challenges of the terahertz technology, providing new efficient ways of actively manipulating, guiding, and generating THz and sub-THz fields. This is accomplished by taking a truly interdisciplinary approach and exploiting the physics of superconductors, and the electrodynamics of metamaterial and plasmonic structures. Metamaterial arrays made of superconducting films are suggested for manipulating the THz radiations, while superconducting plasmonic waveguides are considered for achieving efficient propagation of THz waves. In addition, metamaterial arrays composed of bimetallic rings that exhibit both plasmonic and thermoelectric properties are investigated as a possible new source of THz radiation and strong magnetic fields. I have demonstrated experimentally, for the first time, that high- and low-critical temperature superconducting metamaterials are able to show sub-radiant resonances of Fano type that can be controlled with temperature. Such metamaterial resonances show vanishing radiation losses, while superconductors have very low Ohmic losses. Thus, these structures offer an efficient way to actively manipulate sub-THz (and THz) fields. I have reported on the first experimental realisation of the extraordinary transmission effect in periodically perforated superconducting films. I have shown that the level of transmission of sub-THz waves through these structures could be controlled with temperature near the superconducting transition point. The latter enabled to identify the role of the plasmonic excitations in the mechanism of extraordinary transmission. I have shown that superconductors below their gap-frequency (several THz for high-temperature superconductors) are similar in behaviour to plasmonic metals at optical frequencies. Geometries of superconducting structures have been identified that support almost dispersionless propagation of plasmonic-like modes with frequencies up to several THz, exhibiting both extreme localisation and very low propagation losses. Finally, I have theoretically demonstrated that metamaterial arrays composed of bimetallic gold-nickel nanorings, when illuminated by ultrafast optical pulses, support transient thermoelectric currents that lead to the generation of magnetic pulses of subpicosecond duration, nanoscale localisation and peak amplitudes of the order of one Tesla. These results could facilitate the study of ultrafast nanoscale magnetic phenomena and have potential use in such applications as material characterisation and magnetic recording.
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Dupre, Olivier. "Spectroscopie optique au sub-THz et au sub-Kelvin de supraconducteurs." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY033/document.

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Dans le cadre de ma thèse, j’ai étudié des supraconducteurs par une nouvelle technique de spectroscopie optique. Cette technique, inspirée de détecteurs de photons utilisés en astrophysique, permet de faire des mesures de 0 à 300 GHz, avec une résolution de ~1 GHz, à une température de ~100 mK. Les supraconducteurs étudiés sont lithographiés sous la forme de résonateurs pour devenir des détecteurs de photons dont leur fréquence de résonance varie en fonction de leur densité superfluide. Au cours de cette thèse, j’ai fabriqué et étudié des résonateurs à partir de différents matériaux supraconducteurs (en couches minces). La dimensionnalité joue un rôle essentiel dans la supraconductivité. A priori, en deux dimensions un système ne devrait pas être supraconducteur mais il existe de nombreux contre-exemples (monocouche de FeSe, interface d’oxydes,…). Dans ce contexte l’aluminium est particulièrement intéressant car le mécanisme supraconducteur est conventionnel (couplage électron-phonon) et que l’on peut faire varier son épaisseur (couches minces) et sa microstructure (aluminium granulaire) relativement facilement. La thèse se compose de deux parties.Dans une première partie je me suis intéressé à l’influence de l’épaisseur sur la supraconductivité de couches minces d’aluminium (de 15nm à 200nm). Dans la majorité des matériaux supraconducteurs, la température critique diminue avec l’épaisseur alors que dans certains matériaux, comme dans l’aluminium, elle augmente. Différentes théories existent pour expliquer ce phénomène mais il n’existe actuellement aucun consensus. Par des techniques combinées de spectroscopie à forte résolution et de résistivité, j’essaye d’apporter un éclairage nouveau à l’augmentation de la température critique dans l’aluminium lors de la diminution de l’épaisseur. J’interprète ce phénomène comme étant lié à un durcissement des phonons, ce qui ne constitue pas une explication habituellement citée.Dans une deuxième partie, on présente des supraconducteurs désordonnés, à savoir l’oxyde d’indium (InOx) et l’aluminium granulaire (GrAl). Dans ces matériaux, on a mis en évidence des excitations sous le gap supraconducteur par des mesures de spectroscopie optique. Ces excitations, dont l’origine est discutée, sont a priori inattendues dans les supraconducteurs conventionnels.Ainsi, on a mis en évidence dans des résonateurs d’oxyde d’indium la détection très sélective en énergie de photons ayant une énergie très inférieure au gap supraconducteur. On explique le mécanisme de détection en démontrant qu’il est lié à l’excitation des modes de résonance d’ordre supérieur, associée à la non linéarité de l’inductance cinétique avec le courant circulant dans le résonateur.Dans l’aluminium granulaire, on a étudié certaines excitations sous le gap supraconducteur dans deux échantillons de résistivité différente. Une antenne radio-fréquences placée devant le cryostat illumine les résonateurs. On choisit un résonateur quelconque et on sélectionne la fréquence des photons délivrés par l'antenne de telle sorte qu'elle corresponde aux différentes excitations que l'on souhaite étudier. On s'intéresse alors à l'influence de la puissance des photons incidents sur l’évolution de la résonance. On met en évidence des comportements non standards de la fréquence de résonance ainsi que du facteur de qualité, selon les excitations étudiées
During my PhD-thesis, I studied superconductors thanks to a new optical spectroscopy measurements technique, based on photon detectors for astrophysics. This technique enables measurements ranging from 0 to 300 GHz with a resolution of ~1 GHz at a temperature of ~100 mK. The superconductors are lithographed into resonators whose resonance frequency depends on the superfluid density. During this thesis, I made and studied resonators from different superconducting materials in thin films.Dimensionality plays a fundamental role in superconductors. In principle, in two dimensions a system should not be superconducting but there are a lot of counterexamples like single layer of FeSe or oxide interfaces. In this context, aluminum is particularly interesting for mainly two reasons. First, the superconducting mechanism is conventional : it consists in an electron-phonon coupling. Then, it is pretty easy to modify its thickness (thin films) and its microstructure (granular aluminum).The manuscript is composed of two parts.In the first part, I studied the role played by the thickness on the superconductivity of aluminum thin films, ranging from 15 nm to 200 nm. In most superconductors, the critical temperature decreases with thickness, whereas in some materials like aluminum, it increases. Several theories may explain this phenomenon but there is currently no consensus. Thanks to combined techniques of high resolution optical spectroscopy and of resistivity measurements, I suggest that the origin of the critical temperature increase in aluminum thin films would be phonon hardening. This explanation is not among the popular ones.In the second part, we present disordered superconductors, namely indium oxide (InOx) and granular aluminum (GrAl). In these materials, we evidenced sub-gap optical absorptions. In principle, these absorptions are unexpected in superconductors. We show that they are caused by higher order resonance mode excitations combined with kinetic inductance non-linearity with the current circulating in the resonator.In granular aluminum, we studied some sub-gap excitations in two samples with a different room temperature resistivity. A radio-frequency antenna situated in front of the dilution refrigerator illuminates the resonators. We choose a resonator and we select the photon frequency in such a way that it matches with the different studied excitations. We observe the influence of the incident photon power on the resonance. We evidence non standard behaviors of resonance frequency and quality factor, according to the studied excitations
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Fernandes, Luís Olavo de Toledo. "Tendências espectrais de explosões solares em frequências Sub-THz." Universidade Presbiteriana Mackenzie, 2017. http://tede.mackenzie.br/jspui/handle/tede/3470.

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Fundação de Amparo a Pesquisa do Estado de São Paulo
Fundo Mackenzie de Pesquisa
Previous sub-THz studies were derived from single event observations. Spectral trends for a larger collection of sub-THz bursts have been analyzed for the first time. It consists of a set of 16 moderate to small impulsive solar radio bursts observed at 0.2 and 0.4 THz by the Solar Submillimeter-wave Telescope (SST) between 2012 and 2014 at El Leoncito, in the Argentinean Andes.The peak burst spectra included data from new solar patrol radio telescopes (45 and 90 GHz),and were complemented with microwave data obtained by the RSTN, when available. We evaluate critically errors and uncertainties in sub- THz flux estimates caused by calibration techniques and the corrections for atmospheric transmission, and introduce a new method to obtain uniform flux scale criterion for all 16 events. The sub-THz bursts were searched during reported GOES soft x-ray events of class C or larger, during periods of the SST observations. Seven out of 16 events exhibit spectral maxima in the range 5-40 GHz with fluxes decaying at sub-THz frequencies (3 of them associated to GOES class X, and 4 to class M). Nine out of 16 events exhibited the sub-THz spectral component. From these, 5 events exhibited the sub-THz emission fluxes increasing with frequency separated from the microwave spectral component (2 classified as X and 3 as M) and 4 events have been detected at sub-THz frequencies only (3 classified as M and 1 as C). The results suggest that the THz component might be always present, with the minimum turn-over frequency increasing as a function of the energy of the emitting electrons. In view of the peculiar nature of many sub-THz bursts events, their better understanding requires further investigations of bursts examined on the standpoint of SST observations alone.
Estudos prévios de explosões solares na faixa sub-THz foram derivados de observações de eventos isolados. Tendências espectrais para uma coleção de eventos sub-THz foram analisadas pela primeira vez. O trabalho consiste no estudo e comparação de um conjunto de 16 explosões solares impulsivas muito bem detectadas, classificadas como fracas ou moderadas, observadas em 0,2 e 0,4 THz pelo Telescópio Solar para Ondas Submilimétricas (SST – 𝑆𝑜𝑙𝑎𝑟 𝑆𝑢𝑏𝑚𝑖𝑙𝑙𝑖𝑚𝑒𝑡𝑒𝑟−𝑤𝑎𝑣𝑒 𝑇𝑒𝑙𝑒𝑠𝑐𝑜𝑝𝑒) entre os anos de 2012 e 2014, no parque de 𝐸𝑙 𝐿𝑒𝑜𝑛𝑐𝑖𝑡𝑜, nos Andes Argentinos. Os espectros destas explosões são complementados com dados dos rádio polarímetros (POEMAS - 𝑃𝑂𝑙𝑎𝑟𝑖𝑧𝑎𝑡𝑖𝑜𝑛 𝐸𝑚𝑖𝑠𝑠𝑖𝑜𝑛 𝑜𝑓 𝑀𝑖𝑙𝑙𝑖𝑚𝑒𝑡𝑒𝑟 𝐴𝑐𝑡𝑖𝑣𝑖𝑡𝑦 𝑎𝑡 𝑡ℎ𝑒 𝑆𝑢𝑛) em 45 e 90 GHz, e também com dados em microondas, obtidos pela Rede de Telescópios Solar em Rádio (RSTN – 𝑅𝑎𝑑𝑖𝑜 𝑆𝑜𝑙𝑎𝑟 𝑇𝑒𝑙𝑒𝑠𝑐𝑜𝑝𝑒 𝑁𝑒𝑡𝑤𝑜𝑟𝑘), quando disponíveis. Foram avaliados criticamente os erros e incertezas na estimativa de fluxos na faixa sub-THz, causados pelas técnicas de calibração e correções para transmissão atmosférica, e, assim, introduzido um novo método para obtenção de uma escala de fluxo uniforme, com o mesmo critério para todos os 16 eventos. Os eventos detectados na faixa sub-THz foram analisados e comparados com eventos observados em raios X pelo satélite GOES - 𝐺𝑒𝑜𝑒𝑠𝑡𝑎𝑡𝑖𝑜𝑛𝑎𝑟𝑦 𝑂𝑝𝑒𝑟𝑎𝑡𝑖𝑜𝑛𝑎𝑙 𝐸𝑛𝑣𝑖𝑟𝑜𝑛𝑚𝑒𝑛𝑡𝑎𝑙 𝑆𝑎𝑡𝑒𝑙𝑙𝑖𝑡𝑒, classificados como C, M, ou X, para o mesmo período de operação do SST. A análise estatística é referente a este conjunto de explosões solares muito bem detectadas, onde 7 dos 16 eventos exibiram valores de fluxo máximos na faixa entre 5-40 GHz, com fluxos decaindo nas frequências sub-THz (sendo 3 associados à classe X, e 4 à classe M). Nove dos 16 eventos exibiram a componente espectral sub-THz. Destes, 5 eventos apresentaram emissões na faixa sub- THz com fluxos crescentes com a frequência, separadamente da componente espectral em microondas (2 classificados como X e 3 como M) e 4 eventos foram detectados apenas nas frequências sub-THz (3 com classificação M e 1 com C). Os resultados sugerem que a componente THz pode estar sempre presente, com uma frequência mínima de inversão espectral crescente em função da energia dos elétrons de emissão.
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Kantemur, A., Q. Tang, and H. Xin. "Design of volumetric sub-THz negative refractive index metamaterial with gain." IEEE, 2016. http://hdl.handle.net/10150/622669.

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Conventional passive metamaterials always suffer from the limitation of loss and dispersion due to fundamental causality issue. Especially it becomes severe due to material loss at terahertz frequency. Our work resolves the loss problem by introducing gain device into the metamaterial structure. A passive volumetric metamaterial is firstly designed on the quartz substrate. A negative resistance is inserted into the wire of the structure to provide the gain. We have identified resonant tunneling diodes that work up into THz frequency and shown in simulation that simultaneous negative index and gain can be obtained.
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Moron, Guerra José. "Design of Sub-THz heterodyne receivers in 65 nm CMOS process." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10053/document.

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Le but de cette thèse est d'explorer les opportunités de design au-delà des fréquences millimétriques en se rapprochant le plus possible de la bande THz en technologie CMOS. L’application spécifique est la détection hétérodyne pour l'imagerie THz. Sachant qu’on vise des fréquences autour de 280 GHz et on travaille avec la technologie CMOS 65 nm, les composant réalisés fonctionnent 80 GHz au-dessus de la fréquence de coupure fmax des transistors utilisés. En termes de réalisation on a développé deux oscillateurs à verrouillage par injection sous-harmonique fonctionnant autour de 280 GHz. La fréquence d’injection de chaque oscillateur est d’environ 47 GHz (1/6 de la fréquence de sortie). Afin de produire des oscillations au-delà de fmax, des techniques de génération harmonique ont été utilisées (push-push, triple-push, etc). Les oscillateurs génèrent des signaux de – 19 et – 14 dBm de puissance à 280 GHz. Chaque composant a été utilisé comme oscillateur local pour des récepteurs hétérodynes fonctionnant à la même fréquence. Ces récepteurs n’ont pas de LNA au début de la chaîne à cause des faibles fréquences de coure néanmoins ils utilisent des mélangeurs passifs afin de pouvoir multiplier des signaux au-delà des limites. Les deux récepteurs développés ont un gain de conversion de – 6 dB et ont des figures de bruit (NF) de 36 et 30 dB. La version la plus performante du récepteur (30 dB de NF) a été intégrée avec une antenne développée par le Labsticc afin de pouvoir réaliser des images Sub-THz avec la détection hétérodyne
The main goal of this thesis is to explore design opportunities beyond the millimeter wave frequencies and to get as close as possible to the THz band using CMOS technologies. The main application is the heterodyne detection for THz imaging. The cut-off frequencies ft/fmax of the used process (65 nm CMOS) are 150/205 GHz, the chosen operation frequency of the developed systems is 280 GHz which means that the circuits developed during this thesis operate at least 80 GHz beyond their fmax cut-off frequency. Two 280 GHz sub-harmonic injection locked oscillators were developed, the injection frequency corresponds to one sixth of the ouput frequency. In order to generate oscillations beyond fmax, harmonic boost techniques are used such as the push-push and triple push techniques. The output power of the oscillators are - 19 and - 14 dBm at 280 GHz. Both components were used as local oscillators for two heterodyne receivers operating around the same frequency. In order to down-covert the Sub-THz signal, a passive resistive mixer is used; this kind of circuit allows mixing beyond the active transistor limits. Also there is no LNA at the begining of the Rx chain since the cut-off frequencies are very low and there will be no gain for amplification at 280 GHz. The conversion gain of both receivers is - 6 dB however the NF's are 36 dB and 30 dB. The best receiver (30 dB) is co-integrated with an antenna (developed by Labsticc) using the same process allowing heterodyne detection THz imaging
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Billet, Maximilien. "Photodétecteurs rapides à la longueur d’onde de 1550 nm pour la génération et la détection d’ondes sub-THz et THz." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I008/document.

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Les photodétecteurs rapides sont des composants optoélectroniques qui permettent de générer et de détecter des ondes de fréquences sub-THz et THz. Cette thèse présente la conception, la fabrication et la caractérisation de photodétecteurs rapides à semiconducteurs III-V. L’objectif est de proposer des systèmes fonctionnant à la longueur d’onde de 1550 nm, et donc compatibles avec les technologies des télécommunications. Nous étudions en détail des photoconducteurs en AsGa-BT pour le sous-échantillonnage, des photodétecteurs de type MSM-InAlAs/InGaAs pour le sous-échantillonnage et le photomélange et des photodiodes UTC en InGaAs/InP pour le photomélange
Fast photodetectors are optoelectronic devices wich allow to generate and to detect electromagnetic waves at sub-THz and THz frequencies. This thesis presents the design, the fabrication and the characterization of fast photodetectors made using III-V semiconductors. The objective is to develop systems working at a wavelength of 1550nm, compatibleswith the telecommunication technologies. We will study in detail LT-GaAs photoconductors for sub-sampling, InAlAs/InGaAs-MSM photodetectors for sub-sampling and photomixing and InGaAs/InP UTC-photodiodes for photomixing
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Escate, Maria Victoria Gutierrez. "O estudo das explosões solares simpatéticas e sua observação em frequências SUB-THz." Universidade Presbiteriana Mackenzie, 2015. http://tede.mackenzie.br/jspui/handle/tede/1306.

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Sympathetic solar flares are events occurring nearly simultaneously at distinct active regions with physical connection between them. Two flares that occurred on March 8, 2011 in active regions NOAA (National Oceanic and Atmospheric Administration) 11163 (N17W91) and AR 11165 (S20W91) is being studied. The larger flare occurred in the Southern region and was preceded by a smaller flare in the Northern region, about 5 minutes before. Both events were observed by RHESSI. The first explosion was detected by SST in the AR of north hemisphere, in two stages. There are also EUV SDO high cadence images that exhibit a distinct rapid flash coinciding with the SST burst as well as clear large scale magnetic connections between the two active regions. Three possible flare triggering agents from the Northern region towards the Southern region are being investigated: (a) hydrodynamic waves along the large coronal interconnecting magnetic structure, (b) surface Moreton-like shock waves, (c) plasma echoes.
Explosões solares simpatéticas são eventos que ocorrem quase simultaneamente, em regiões ativas distintas. Este trabalho apresenta o estudo de duas explosões solares que ocorreram no dia 8 de março de 2011, nas regiões ativas NOAA 11163 (N17W91) e 11165 (S20W91), entendidas como um evento simpatético característico. A maior explosão ocorreu na região sul, precedida por uma explosão menor na região norte, 5 minutos antes. Ambas detecções foram observadas em raios-X duros pelo satélite RHESSI. A primeira explosão também foi detectada pelo SST na RA do hemisfério norte. Imagens do SDO/AIA em EUV de alta cadência exibem um flash rápido e distinto, coincidente com a detecção do SST. As observações mostram que existem conexões magnéticas em grande escala entre as duas regiões ativas. Isso nos permitiu estudar três possíveis agentes de ativação entre as duas regiões ativas, sendo investigados, então, os seguinte mecanismos de ativação: (i) ondas hidrodinâmicas, ao longo da grande estrutura magnética coronal; (ii) ondas de choque do tipo Moreton, e, (iii) eco de plasma.
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Cortes-Medellin, German, Stefan O'Dougherty, Christopher Walker, Paul F. Goldsmith, Chris Groppi, Steve Smith, and Pietro Bernasconi. "Optical design for the large balloon reflector." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622510.

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We present the details of the optical design, corrector system, mechanical layout, tolerances, pointing requirements, and overall performance of the sub-millimeter wavelength Large Balloon Reflector telescope (LBR).
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Graff, David L. "Sub-millimeter Spectroscopy at the Confusion Limit." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275448827.

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Janke, Christof. "Neuartige Methoden zur Erhöhung der Generationseffizienz kohärenter THz-Strahlung und deren Transmission durch Sub-wellenlängen-Aperturen /." Aachen : Shaker, 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014182311&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Books on the topic "Sub-THz"

1

Kaurav, Priyansha, and Shiban Kishen Koul. Sub-THz Sensing Technology for Biomedical Applications. Springer, 2022.

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A, Dax, and National Institute of Standards and Technology (U.S.), eds. Sub-Doppler frequency measurements on OCS at 87 THz (3.4 [micron]m) with the CO overtone laser: Considerations and details. Boulder, CO: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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A, Dax, and National Institute of Standards and Technology (U.S.), eds. Sub-Doppler frequency measurements on OCS at 87 THz (3.4 [micron]m) with the CO overtone laser: Considerations and details. Boulder, CO: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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A, Dax, and National Institute of Standards and Technology (U.S.), eds. Sub-Doppler frequency measurements on OCS at 87 THz (3.4 [micron]m) with the CO overtone laser: Considerations and details. Boulder, CO: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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A, Dax, and National Institute of Standards and Technology (U.S.), eds. Sub-Doppler frequency measurements on OCS at 87 THz (3.4 [micron]m) with the CO overtone laser: Considerations and details. Boulder, CO: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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A, Dax, and National Institute of Standards and Technology (U.S.), eds. Sub-Doppler frequency measurements on OCS at 87 THz (3.4 [micron]m) with the CO overtone laser: Considerations and details. Boulder, CO: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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Sub-Doppler frequency measurements on OCS at 87 THz (3.4 [micron]m) with the CO overtone laser: Considerations and details. Boulder, CO: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1994.

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8

Rappaport, Theodore S., Kate A. Remley, Camillo Gentile, Andreas F. Molisch, and Alenka Zajić, eds. Radio Propagation Measurements and Channel Modeling: Best Practices for Millimeter-Wave and Sub-Terahertz Frequencies. Cambridge University Press, 2022. http://dx.doi.org/10.1017/9781009122740.

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This book offers comprehensive, practical guidance on RF propagation channel characterization at mmWave and sub-terahertz frequencies, with an overview of both measurement systems and current and future channel models. It introduces the key concepts required for performing accurate mmWave channel measurements, including channel sounder architectures, calibration methods, channel sounder performance metrics and their relationship to propagation channel characteristics. With a comprehensive introduction to mmWave channel models, the book allows readers to carefully review and select the most appropriate channel model for their application. The book provides fundamental system theory accessible in a step by step way with clear examples throughout. With inter- and multidisciplinary perspectives, the reader will observe the tight interaction between measurements and modeling for these frequency bands and how different disciplines interact. This is an excellent reference for researchers, including graduate students, working on mmWave and sub-THz wireless communications, and for engineers developing communication systems.
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Basu, Prasanta Kumar, Bratati Mukhopadhyay, and Rikmantra Basu. Semiconductor Nanophotonics. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198784692.001.0001.

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Abstract Nanometre sized structures made of semiconductors, insulators and metals and grown by modern growth technologies or by chemical synthesis exhibit novel electronic and optical phenomena due to confinement of electrons and photons. Strong interactions between electrons and photons in narrow regions lead to inhibited spontaneous emission, thresholdless laser operation, and Bose Einstein condensation of exciton-polaritons in microcavities. Generation of sub-wavelength radiation by surface Plasmon-polaritons at metal-semiconductor interfaces, creation of photonic band gap in dielectrics, and realization of nanometer sized semiconductor or insulator structures with negative permittivity and permeability, known as metamaterials, are further examples in the area of nanophotonics. The studies help develop Spasers and plasmonic nanolasers of subwavelength dimensions, paving the way to use plasmonics in future data centres and high speed computers working at THz bandwidth with less than a few fJ/bit dissipation. The present book intends to serveas a textbook for graduate students and researchers intending to have introductory ideas of semiconductor nanophotonics. It gives an introduction to electron-photon interactions in quantum wells, wires and dots and then discusses the processes in microcavities, photonic band gaps and metamaterials and related applications. The phenomena and device applications under strong light-matter interactions are discussed by mostly using classical and semi-classical theories. Numerous examples and problems accompany each chapter.
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Book chapters on the topic "Sub-THz"

1

Vertiy, Alexei, and Andrei Pavlyuchenko. "Passive Sub-THz Imaging." In NATO Science for Peace and Security Series B: Physics and Biophysics, 161–68. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7265-6_14.

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Sizov, F., M. Sakhno, A. Golenkov, V. Petryakov, Z. Tsybrii, V. Reva, and V. Zabudsky. "Uncooled Rectification and Bolometer Type THz/Sub-THz Detectors." In NATO Science for Peace and Security Series B: Physics and Biophysics, 53–73. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8828-1_3.

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Vaks, V., E. Domracheva, E. Sobakinskaya, and M. Chernyaeva. "Sub-THz Spectroscopy for Security Related Gas Detection." In NATO Science for Peace and Security Series B: Physics and Biophysics, 189–96. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8572-3_24.

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Kumar, Rajnish, and Shlomi Arnon. "Enhancing Cybersecurity of Satellites at Sub-THz Bands." In Cyber Security, Cryptology, and Machine Learning, 356–65. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-07689-3_26.

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Özkan, Vedat Ali, Yıldız Menteşe, Taylan Takan, Asaf Behzat Şahin, and Hakan Altan. "Compressive Sensing Imaging at Sub-THz Frequency in Transmission Mode." In NATO Science for Peace and Security Series B: Physics and Biophysics, 49–55. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-1093-8_7.

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Schmuttenmaer, Charles A., Matthew C. Beard, and Gordon M. Turner. "Exploring sub-picosecond dynamics in the far-infrared with THz spectroscopy." In Ultrafast Phenomena XIII, 407–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-59319-2_126.

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Mayer, B., C. Schmidt, J. Bühler, J. Fischer, D. V. Seletskiy, D. Brida, A. Pashkin, and Alfred Leitenstorfer. "Tailoring of High-Field Multi-THz Waveforms with Sub-Cycle Precision." In Springer Proceedings in Physics, 805–8. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13242-6_197.

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Zaitsev, V. V., A. V. Stepanov, and P. Kaufmann. "On the Origin of Pulsations of Sub-THz Emission from Solar Flares." In Coronal Magnetometry, 395–410. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-2038-9_24.

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Protsenko, I. A., A. A. Barannik, A. I. Gubin, N. T. Cherpak, and S. A. Vitusevich. "Testing of Sub-THz Properties of Bioliquids Using WGM Resonator with Microfluidic Channel." In NATO Science for Peace and Security Series B: Physics and Biophysics, 57–62. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-1093-8_8.

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Gómez Rivas, J., C. Janke, P. Haring Bolívar, and H. Kurz. "Surface-plasmon-polariton enhanced tunneling of THz radiation through arrays of sub-wavelength apertures." In Springer Series in Chemical Physics, 690–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27213-5_209.

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Conference papers on the topic "Sub-THz"

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Sizov, F., V. Dobrovolsky, V. Zabudsky, N. Momot, Z. Tsybrii, N. Michailov, and S. Dvoretskii. "THz/sub-THz narrow-gap semiconductor detector." In Photonics Asia 2010, edited by Cunlin Zhang, Xi-Cheng Zhang, Peter H. Siegel, Li He, and Sheng-Cai Shi. SPIE, 2010. http://dx.doi.org/10.1117/12.869983.

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Hramov, A. E., V. V. Makarov, A. A. Koronovskii, K. N. Alekseev, V. A. Maximenko, N. S. Frolov, M. T. Greenaway, T. M. Fromhold, O. I. Moskalenko, and A. G. Balanov. "Sub-THz/THz amplification in a semiconductor superlattice." In 2015 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). IEEE, 2015. http://dx.doi.org/10.1109/irmmw-thz.2015.7327516.

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Ding, Xuan, Bo Yu, Hai Yu, Sajjad S. Saber, and Qun Jane Gu. "Multiplexing Schemes for sub-THz/THz Interconnects (Invited)." In 2022 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT). IEEE, 2022. http://dx.doi.org/10.1109/rfit54256.2022.9882455.

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Lu, Ja-Yu, Hung-Wen Chen, Li-Jin Chen, and Chi-Kuang Sun. "Sub-wavelength THz plastic fibers." In Integrated Optoelectronic Devices 2007, edited by Kurt J. Linden and Laurence P. Sadwick. SPIE, 2007. http://dx.doi.org/10.1117/12.705499.

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Milcho, Mihail V., Kostyantyn Ilyenko, Viktor V. Zavertanniy, Tetyana Yatsenko, and Anatoly S. Tishchenko. "The sub-THz clinotron-multiplier." In 2018 IEEE International Vacuum Electronics Conference (IVEC). IEEE, 2018. http://dx.doi.org/10.1109/ivec.2018.8391562.

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Chai, X., X. Ropagnol, S. M. Raeis-Zadeh, M. Reid, S. Safavi-Naeini, and T. Ozaki. "Sub-cycle THz nonlinear optics." In JSAP-OSA Joint Symposia. Washington, D.C.: Optica Publishing Group, 2018. http://dx.doi.org/10.1364/jsap.2018.18p_221b_6.

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Paulillo, B., S. Pirotta, S. Guilet, P. Crozat, J. M. Manceau, N. Zerounian, A. Degiron, et al. "Sub-wavelength THz resonators for ultra-fast THz detection." In SPIE OPTO, edited by Manijeh Razeghi. SPIE, 2017. http://dx.doi.org/10.1117/12.2251405.

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Zhou, Shuyu, Zhenjie Li, Pengfei Chen, Xuecou Tu, Chengtao Jiang, Yichen Zhang, Qiangqiang Wu, et al. "An Nb5N6 microbolometer THz camera." In 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz). IEEE, 2021. http://dx.doi.org/10.1109/irmmw-thz50926.2021.9567095.

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Sengupta, Kaushik, Xuyang Lu, Suresh Venkatesh, and Bingjun Tang. "Physically Secure Sub-THz Wireless Links." In 2020 IEEE International Conference on Communications Workshops (ICC Workshops). IEEE, 2020. http://dx.doi.org/10.1109/iccworkshops49005.2020.9145177.

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Foldesy, Peter, and Akos Zarandy. "Integrated CMOS sub-THz imager array." In 2012 13th International Workshop on Cellular Nanoscale Networks and their Applications (CNNA 2012). IEEE, 2012. http://dx.doi.org/10.1109/cnna.2012.6331457.

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Reports on the topic "Sub-THz"

1

Joye, Colin D., Alan M. Cook, Jeffrey P. Calame, David K. Abe, and Baruch Levush. Breakthrough UV LIGA Microfabrication of Sub-mm and THz Circuits. Fort Belvoir, VA: Defense Technical Information Center, January 2013. http://dx.doi.org/10.21236/ad1004172.

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Dax, Adrien M. Sub-doppler frequency measurements on OCS at 87 THz (3.4 *m) with the CO overtone Laser:. Gaithersburg, MD: National Bureau of Standards, 1994. http://dx.doi.org/10.6028/nist.tn.1365.

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