Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 274 for “"THz"”.
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Developments and applications of THz polaritonics, efficient THz generation, and single-shot THz detection
… resolution of 1.5 [mu]m (< [lambda]/100 at 0.5 THz) using polarization gating, and a noise floor of 0.1% for polarization gating. Using the low noise floor of polarization gating imaging, we demonstrate for the first time the ability to perform time resolved imaging of terahertz waves …
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Laterally confined THz sources and graphene based THz optics
… in the electromagnetic spectrum, the Terahertz (THz) gap, provides an exciting opportunity for future wireless communications as this band has been under utilised. This doctoral work takes a two-pronged approach into closing the THz gap with low-dimensional materials. The first attempt addresses …
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Developments in THz Polaritonics: Towards Integrated Nonlinear THz Spectroscopy
The terahertz (THz) polaritonics platform is a compact, waveguide-based platform for the generation, manipulation, and detection of THz waves. The platform uses thin (<100 μm) lithium niobate (LiNbO₃, LN) and lithium tantalate (LiTaO₃, LT) slabs, which can be patterned to control THz propagation. …
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THz polaritonics : optical THz generation, detection, and control on a chip
The THz polaritonics system is an on-chip platform for THz generation, detection, and control. THz-frequency electromagnetic waves are generated directly in a thin slab of lithium niobate crystal where they can be amplified and guided. Time-resolved phase-sensitive imaging lets us capture movies of …
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PULSED THz GENERATION BASED ON PHOTOCONDUCTIVE ANTENNA FOR THz TIME-DOMAIN SPECTROSCOPY
Terahertz (THz) wave is defined as the region of the electromagnetic spectrum with frequencies ranging from 100 GHz to 10 THz. The THz technology has many potential applications. However, it was called the “THz gap” due to the lack of efficient generation of THz waves. Therefore, the development of …
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New Frontiers in Silicon Terahertz Electronics: Wirelessly Powered THz-ID and Secure THz Links
… systems and applications in the terahertz (THz) band over the last decade. However, ultra-low-power (<25𝜇W) or battery-less THz transceivers have not been explored yet due to the stringent challenges posed by them. Likewise, the notion of wireless power transfer at THz frequency is …
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THz Spintronics at Interfaces of Metals
Contains fulltext : 236606.pdf (Publisher’s version ) (Open Access)
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THz spin dynamics in collinear antiferromagnets
Contains fulltext : 317916.pdf (Publisher’s version ) (Open Access)
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THz transceiver/two-photon absorption autocorrelator
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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THz Radiation Detection Based on CMOS Technology
The Terahertz (THz) band of the electromagnetic spectrum, also defined as sub-millimeter waves, covers the frequency range from 300 GHz to 10 THz. There are several unique characteristics of the radiation in this frequency range such as the non-ionizing nature, since the associated power is low and …
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New frontiers in THz quantum cascade lasers
Terahertz (THz) frequencies (0.5-10 THz) are among the most underdeveloped electromagnetic spectra, even though their application potentials are great in imaging, sensing, and communications. This underdevelopment is primarily due to the lack of compact and powerful THz sources. The invention of …
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THz Cryo-CMOS Link for Quantum Computing
In this thesis, a terahertz (THz) cryo-CMOS link for quantum computing and other cryogenic applications is designed. This THz wireless link can efficiently deliver the control signals and data between room temperature and cryogenic environment. Its operation allows for a small antenna aperture …
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Time-Resolved THz Magnetospectroscopy: Techniques and Applications
Ultrafast terahertz (THz) spectroscopy has been advanced by a research effort that includes technique development as a central focus. Multiple paradigm-shifting breakthroughs in experimental techniques have emerged in recent decades, including optical pump/THz probe spectroscopy, THz polaritonics, …
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Novel characterization of materials using THz spectroscopic techniques
… and technical challenges within the terahertz (THz) frequency regime have recently motivated an array of new research activities. This involves numerous applications of this region of the electromagnetic spectrum between approximately 100 GHz (3mm) and 3 THz (100 um) for both spectroscopy and …
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All-optical electron acceleration with ultrafast THz pulses
… in - the demonstration of the first ultrafast THz-driven electron gun, a technology with the potential to deliver unprecedented electron beam quality to scientists studying matter at the ultrafast and ultrafast scale via electron diffraction or x-ray imaging. In Part 1, we discuss various …
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Multimode Ultrastrong Coupling with FW-BICs in THz Metasurface
… Exploring this phenomenon in the terahertz (THz) region is crucial, as it provides a greater communications bandwidth compared to microwave frequencies. A unit cell of the metasurface consisting of a 200 nm thick Al thin film that consists of the cavity-dipole system on a 150 µm thick quartz …
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THz polaritonics : control, confinement, and strong light-matter interactions
On the terahertz (THz) polaritonics platform, ultrafast optical laser pulses are used to generate and detect THz phonon-polariton wavepackets with full spatiotemporal resolution while they are confined to a thin slab of lithium niobate (LN) or lithium tantalate (LT) that is roughly 30-100 pm thick. …
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THz imaging and microscopy, a multiplexed near-field TeraHertz microscope
None of the THz imaging techniques developed to date, permits high spatial resolution spectroscopic imaging at fast acquisition rates. In the classical THz sub-wavelength imaging with a single aperture, the image is composed by mechanically scanning the sample against a single sub-wavelength …
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THz transmission and resistively detected resonances in III-V semiconductors
Contains fulltext : 312677.pdf (Publisher’s version ) (Open Access)
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