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 29 for “"transmission spectroscopy"”.
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High Frequency Transmission Spectroscopy
High Frequency Transmission Spectroscopy is a novel technique for the characterization of a wide range of materials in a diverse set of problem domains. HFTS has potential implications for problem domains such as semiconductor manufacturing and counterfeit detection, disease/infection screening, …
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Characterising Exoplanet Atmospheres with High-Resolution Transmission Spectroscopy
… aspects of the analysis of high-resolution transmission spectra in optical wavelengths, aimed towards answering key questions regarding detrending techniques and the atmospheric properties of highly irradiated giant exoplanets. I begin by assessing the robustness of telluric correction …
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Exoplanet atmospheric exploration and categorization through transmission spectroscopy
… provide an amazing sample through which transmission spectroscopy observations, combined with atmospheric retrieval, can characterize the atmospheres of those planets. Out of that sample, super Earth exoplanets are particularly interesting because it is expected that their atmospheres …
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Ground-based transmission spectroscopy of three inflated Hot Jupiter exoplanets
… field in astronomy. It includes a method called transmission spectroscopy that searches for planetary spectral fingerprints in the light received from the host star during the event of a transit. This techniques allows for conclusions on the atmospheric composition at the terminator region, the …
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Molecular Characterisation of Exoplanetary Atmospheres using High-Resolution Transmission Spectroscopy
… We here set out to advance high-resolution transmission spectroscopy into the next era of atmospheric characterisation, that of low-mass planets. In this thesis, we demonstrate that it is feasible to characterise the atmospheres of small and temperate exoplanets using ground-based …
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Application of Raman Spectroscopy and Transmission Spectroscopy for Shale Reservoir Characterization: Thermal Maturity Correlation and Organic Matter Type Differentiation
… with thermal maturity is obtained. Raman spectroscopy is investigated using intact, ion-milled, and isolated kerogen samples for OM type differentiation and thermal maturity determination. For OM type differentiation, particular Raman spectral characteristics are recommended. Different …
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Analysis of far-infrared optical spectra of multiferroics
… materials, two optical techniques were utilized: transmission spectroscopy and rotating analyzer ellipsometry. Transmission spectroscopy experiments analyze absorption of light passed through a material. Ellipsometry examines the change of polarization state for a reflected beam of light. Work has …
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Studying the atmosphere of HD 189733 b using the Rossiter-McLaughlin effect
Transmission spectroscopy is a widely-used method for studying exoplanetary atmospheres. However, the differential data analysis techniques that are generally applied to high-resolution ground-based spectroscopic data are only sensitive to narrow spectral features and do not preserve broadband …
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Exoplanetary Atmospheric Retrievals with Transit Spectroscopy in the JWST Era
Atmospheric spectroscopy of planets beyond our solar system can provide important insights into their atmospheric processes, formation histories and even the presence of life. The James Webb Space Telescope (JWST) has already led to the first of likely many breakthroughs with novel chemical …
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Nežindančių motinų pieno maistinių medžiagų koncentracijos pokyčiai po gimdymo ir veiksniai bei procedūros, turintys įtakos jo sudėčiai /
… the first in Lithuania to use the mid-infrared transmission spectroscopy method to establish human milk macronutrient and energy value. Enzyme-linked immunosorbent assays (ELISA) were performed for the analysis of lactoferrin and lysozyme concentration in human milk. In cooperation with Italian …
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Characterization of mid-infrared quantum cascade lasers
… all of which fall into the category of device spectroscopy. Through polarization-dependent transmission and photovoltaic spectroscopy, a large portion of the quantum mechanical bandstructure could be determined, along with many of the parameters characterizing crystal growth quality. In …
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Isotopes as a Tool for Exploring Exoplanet Atmospheres
… are relatively easier to study using transmission spectroscopy compared with terrestrial planets. I simulated observations of CO₂ isotopologues in the H₂-dominated atmospheres of our nearest (< 40 pc), temperate (equilibrium temperature of 250-350 K) sub-Neptunes with M dwarf host …
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Characterisation of cross-linking and moisture ingress detection in an epoxy/amine resin using fibre-optic sensors
… data obtained form the sensors and conventional transmission spectroscopy. Semi-empirical models were used successfully to describe the cross-linking behaviour of the epoxy/amine resin system that was used in this study. Subsequent to monitoring the cross-linking reactions, the fibre-optic …
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Modeling and Observing Atmospheres of Terrestrial Exoplanets
… small, making observing K2-141b’s atmosphere via transmission spectroscopy too difficult with the current technology.
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Enshrouded Exoplanetary Systems
… to probe planetary composition through transmission spectroscopy. I present four planet candidates discovered through this programme orbiting HD11231 and HD38677. The former is a γ-Doradus pulsator hosting a Saturn-mass planet in a 6 day orbit, and the latter is a compact system …
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Nanophotonic split-ring resonators as dichroics for molecular spectroscopy
… ultra sensitive biosensors based on vibrational spectroscopy. Through strict engineering of structural morphology, a nanometal’s free electrons can be tuned to resonate at a particular frequency, resulting in amplification and confinement of the electromagnetic field around certain areas of the …
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High resolution Doppler spectroscopy of a transiting ultra-hot Jupiter at optical wavelengths
… excellent targets for characterisation through transmission spectroscopy. Recently, ultra-hot Jupiters (UHJs) have emerged as a distinct class of their own, with their huge dayside temperatures (over 22,00 K) driving entirely different chemistry than their cooler cousins, differing from that …
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Terahertz Time-Domain Spectroscopy of Low-Dimensional Materials and Photonic Structures
… technique has had a significant impact on spectroscopy, imaging and sensing.</p><p>While detectors and emitters have been the main interest in the development of THz technology, other components such as modulators, reflectors and filters are also of importance. In Chapter 2 we apply THz …
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Mid-Infrared Integrated Devices for Optical Chemical Sensing
… gas- sensing applications and methods using MIR spectroscopy by integrating it with other technologies, such as microfluidics and fibre-optics. Firstly, fibre-optic integrated microfluidic devices were developed and tested for con- tinuous fluid monitoring. These showed good sensing capabilities …
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Mueller matrix spectroscopic ellipsometry of multiferroics
… rotating analyzer ellipsometry, and optical transmission spectroscopy. Spectra of the optical phonons are described in terms of the temperature dependencies of their frequency, damping, and oscillator strength. For all studies, oxide materials' clear signatures of the spin-phonon interaction …
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