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Relevant bibliographies by topics / Terahertz (THz) Bands / Dissertations / Theses

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Dissertations / Theses on the topic 'Terahertz (THz) Bands'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Berenguer, Verdú Antonio José. "Analysis and design of efficient passive components for the millimeter-wave and THz bands." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/84004.

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This thesis tackles issues of particular interest regarding analysis and design of passive components at the mm-wave and Terahertz (THz) bands. Innovative analysis techniques and modeling of complex structures, design procedures, and practical implementation of advanced passive devices are presented. The first part of the thesis is dedicated to THz passive components. These days, THz technology suffers from the lack of suitable waveguiding structures since both, metals and dielectric, are lossy at THz frequencies. This implies that neither conventional closed metallic structures used at micr

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2

Molis, Gediminas. "Investigation of the terahertz pulse generation from the narrow band gap semiconductor surfaces." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100623_093655-47390.

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Generation of terahertz radiation from semiconductor surfaces has great potential for investigation of physical properties of semiconductors. This work focuses on the semiconductor research when generating terahertz pulses from a variety of semiconductor surfaces. THz radiation from semiconductor surfaces can be generated on a whole range of physical mechanisms: the surface field screening, photo-Dember effect, the optical rectification, electric field induced optical rectification, plasma oscillations, coherent phonons and plasmons. A number of important semiconductor parameters such as refra

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3

Jornet, Montana Josep Miquel. "Fundamentals of electromagnetic nanonetworks in the terahertz band." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50233.

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Nanotechnology is providing a new set of tools to the engineering community to design nanoscale components with unprecedented functionalities. The integration of several nano-components into a single entity will enable the development of advanced nanomachines. Nanonetworks, i.e., networks of nanomachines, will enable a plethora of applications in the biomedical, environmental, industrial and military fields. To date, it is still not clear how nanomachines will communicate. The miniaturization of a classical antenna to meet the size requirements of nanomachines would impose the use of very high

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4

Hawecker, Jacques. "Terahertz time resolved spectroscopy of Intersubband Polaritons and Spintronic Emitters." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS101.

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Le domaine térahertz (THz) inclut une riche variété d’applications pratiques et fondamentales où la basse énergie des photons permettent l’investigation de nouveaux phénomènes d’interaction lumière-matière. Ces travaux se focalisent sur deux thématiques émergentes où la spectroscopie THz ultra-rapide représente un outil particulièrement adapté à l’étude de phénomènes fondamentaux ainsi qu’à la conception de nouvelles sources THz. La première thématique concerne la spintronique THz capable de générer des ondes THz équivalentes à celles obtenues au sein des cristaux non-linéaires. Cette technolo

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5

Han, Chong. "Physical layer solutions for ultra-broadband wireless communications in the terahertz band." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54965.

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In recent years, the wireless data traffic grew exponentially, which was further accompanied by an increasing demand for higher data rates. Towards this aim, Terahertz band (0.1-10 THz) communication is envisioned as one of the key wireless technologies of the next decade. The THz band will help to overcome the spectrum scarcity problems and capacity limitations of current wireless networks, by providing an unprecedentedly large bandwidth. In addition, THz band communication will enable a plethora of long-awaited applications ranging from instantaneous massive data transfer among nearby device

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6

Khairuzzaman, Md. "Digitally selected electronically switchable terahertz-over-fibre." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/digitally-selected-electronically-switchable-terahertzoverfibre(7003c9cb-fa46-4933-9348-b1977a446b7f).html.

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The Quantum Cascade Laser (QCL)-based terahertz-over-fibre (ToF) concept combines the strength of QCLs as ultra-wide bandwidth, high speed data sources, with the mature optical fibre technology. In this thesis, for the first time, by fusing multiple technologies, digitally selected, electronically-switchable ToF concept is experimentally demonstrated. Furthermore, the digital mode selection principle and electronic tuning mechanism provided by novel aperiodic distributed feedback (ADFB) multi-band filters are presented. For the development of electronically tunable ADFB lasers, a range of boun

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7

Bockelt, Alexander Stefan. "Fiber-based Terahertz Time-Domain Spectroscopy Systems Operated in the Telecom Band." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/86148.

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The aim of the doctoral thesis is the study of Terahertz time domain spectrometers relying on telecommunication fiber technology. Optical fiber offers low losses, high stability and compactness, features that ease the deployment of this kind of sensing instruments in industrial scenarios. The development of terahertz signal sources working at telecom wavelengths has enabled the employment of mature, telecom-related photonic components that allowed a transition within THz research from being mainly object of scientific interest to an application-oriented technology. In this thesis, fiber terahe

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8

Lezier, Geoffrey. "Nouvelles sources rapides THz exploitant les émetteurs large bande à effet Spin Hall inverse : nouveaux modes de contrôle des Émetteurs THz Spintroniques." Electronic Thesis or Diss., Centrale Lille Institut, 2024. https://theses.hal.science/tel-05000449.

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Les émetteurs spintroniques THz sont des dispositifs particulièrement prometteurs pour combler le "gap THz", et possèdent de nombreuses propriétés qui permettent de facilement contrôler la polarisation d’émission. Une nouvelle configuration magnétique à anisotropie uniaxiale est développée, et permet le contrôle de la polarisation par champs scalaires sur 360°. Cette même configuration, couplée à un substrat piézoélectrique,permet un contrôle magnéto-électrique des dispositifs, par l’application d’un champ électrique. De plus, le contrôle dynamique est établi par modulation de la polarisation

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9

Regensburger, Stefan [Verfasser], Sascha [Akademischer Betreuer] Preu, and Hartmut [Akademischer Betreuer] Roskos. "Large-area and lumped element field-effect transistors for picosecond-scale detection in the Terahertz band and beyond / Stefan Regensburger ; Sascha Preu, Hartmut Roskos." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2019. http://d-nb.info/1199006505/34.

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10

Regensburger, Stefan [Verfasser], Sascha Akademischer Betreuer] Preu, and Hartmut [Akademischer Betreuer] [Roskos. "Large-area and lumped element field-effect transistors for picosecond-scale detection in the Terahertz band and beyond / Stefan Regensburger ; Sascha Preu, Hartmut Roskos." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2019. http://d-nb.info/1199006505/34.

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11

Lhomel, Antoine. "Méthode de design d'amplificateur de puissance sub-THz en technologie 28 nm FD-SOI pour des applications 6G." Electronic Thesis or Diss., Bordeaux, 2025. http://www.theses.fr/2025BORD0063.

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La bande D [110 GHz - 170 GHz] est envisagée pour les communications à très haute vitesse et le déploiement futur de la 6G. Plusieurs technologies, telles que le III-V ou le silicium, peuvent être envisagées. L'avantage principal du silicium réside dans sa haute densité d'intégration et son faible coût. Par conséquent, les performances de ces technologies doivent être évaluées dans le contexte des applications 6G. L'amplificateur de puissance est l'un des éléments clés du Front-End Radiofréquence. Ainsi, la technologie 28nm FD-SOI CMOS présente un grand intérêt en raison de sa fréquence d'osci

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12

Abadie, Claire. "Détecteurs et lasers THz à base d'antennes accordables en fréquence." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS145/document.

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Les dispositifs optoélectroniques sont importants pour nombreuses applications de la vie de tous les jours : ordinateurs, téléphones, les objets connectés en général. La gamme spectrale du THz (0.1-10 THz) reste cependant un domaine industriellement peu exploité en raison de problèmes intrinsèques à la génération et détection des photons THz.De nombreuses applications relèvent pourtant du THz, dans les domaines médicaux par exemple, pour la détection des gaz à l’état de trace, ou bien pour l’imagerie d’objets opaques dans le visible.Cette thèse se focalise sur les photodétecteurs à puits quant

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13

Sanjuan, Federico. "Generación, detección y procesamiento de señales electromagnéticas en la banda de Terahertz." Tesis, 2014. http://hdl.handle.net/10915/43859.

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La banda de los terahertz (THz) ha sido una de las regiones menos estudiadas del espectro electromagnético debido a la falta de fuentes y detectores. No obstante, desde mediados de los ochenta con los avances tecnológicos se comenzaron a desarrollar sistemas que permitían generar y detectar dichas señales. Los mismos, fueron útiles para realizar espectroscopía que es la aplicación que suscita mayor interés. Esto es debido a que trabajar en la región de los THz posibilita estudiar materiales de manera no invasiva, y no ionizante. También lo es, porque contribuye a aplicaciones en imágenes que

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14

Yang, Chan-Shan, and 楊承山. "Characterization and Applications of Indium-Tin-Oxide Nanomaterials in the Terahertz Frequency Band." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/50508992021527478851.

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博士<br>國立清華大學<br>物理系<br>102<br>In this thesis, we firstly studied the non-Drude behavior of indium-tin-oxide (ITO) nanowhiskers (NWhs) and thin film by using the transmission-type THz-TDS (THz-TDTS) and reflection-type THz-TDRS (THz-TDRS). Their electrical properties, such as plasma frequencies, carrier scattering times, were found to be fitted well by the Drude-Smith model over 0.1~1.4 THz. The non-Drude behavior of complex conductivities in ITO NWhs can be attributed to carrier scattering from grain boundaries and impurity ions. On the other hand, in ITO thin films, non-Drude behavior observe

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15

Alibakhshikenari, M., Chan H. See, B. S. Virdee, and Raed A. Abd-Alhameed. "Meta-Surface Wall Suppression of Mutual Coupling between Microstrip Patch Antenna Arrays for THz-Band Applications." 2018. http://hdl.handle.net/10454/15908.

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Yes<br>This paper presents a novel 2D meta-surface wall to increase the isolation between microstrip patch radiators in an antenna array that is operating in the teraherz (THz) band of 139–141 GHz for applications including communications, medical and security screening systems. The metasurface unit-cell comprises conjoined twin ‘Y-shape’ microstrip structures, which are inter-digitally interleaved together to create the meta-surface wall. The proposed meta-surface wall is free of via holes and defected ground-plane hence easing its fabrication. The meta-surface wall is inserted tightly betwe

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16

Praia, João Miguel Rocha. "Um projeto de sistema de comunicações com reconhecimento de contexto para a banda THz." Master's thesis, 2021. http://hdl.handle.net/10071/24172.

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As comunicações na banda Terahertz (THz) são consideradas uma tecnologia crucial para a transmissão de dados a velocidades ultra-elevadas em sistemas de comunicação sem fios da futura geração. As extensas larguras de banda disponíveis nas frequências de THz têm o custo de graves perdas de propagação e limitações de potência, o que resulta em distâncias de comunicação muito curtas. Superfícies inteligentes reconfiguráveis (RIS) são uma tecnologia promissora para ultrapassar esta limitação uma vez que têm capacidade para moldar as ondas THz, ajustando adequadamente as mudanças de fase. Est

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17

Regensburger, Stefan. "Large-area and lumped element field-effect transistors for picosecond-scale detection in the Terahertz band and beyond." Phd thesis, 2019. https://tuprints.ulb.tu-darmstadt.de/9189/1/2019-10-14_Regensburger_Stefan.pdf.

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Because of inefficient sources and detectors, the Terahertz band (0.1 - 10 THz) located in between electronics with tens of Gigahertz (GHz) and optics with tens of Terahertz (THz) remained hardly accessible for a long time. Rapid advances in research and development of technology for emission and detection in recent years finally enable the technical utilization of this frequency range and an increasing number of applications. This thesis focuses on the direct detection with field-effect transistors (FETs) to improve the access to the THz band with compact and fast room-temperature operating d

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