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 10 of 10 for “"Two-dimensional semiconductors"”.
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Process-induced strain engineering in two dimensional semiconductors
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Ultrafast spatiotemporal dynamics of photoexcitations in two-dimensional semiconductors
This thesis focuses on two families of Van der Waals materials: the transition metal dichalcogenides and the group IV monochalcogenides. First, we explore the spatio-temporal dynamics of photo-excited species in monolayer transition metal dichalcogenides. Using pump-probe spectroscopy, and a range …
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Infrared Energy Conversion in Plasmonic Fields at Two-Dimensional Semiconductors
… of infrared energy within plasmonic fields at two-dimensional, semiconductive transition metal dichalcogenides (TMD) through plasmonic hot electron transport and nonlinear frequency mixing has important implications in next-generation optoelectronics. Drude-Lorentz theory and approximate …
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I. Excitonic Phase Diagram in Silicon: Evidence for Two Condensed Phases. II. Motion of Photoexcited Carriers in Gallium-Arsenide/aluminum(x)gallium(1-X)arsenide Multiple Quantum Wells--Anomalous Confinement at High Densities
… properties of photoexcited carriers in bulk and two-dimensional semiconductors. Two major topics are addressed.
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Spectroscopy of Two-Dimensional Excitons in High Magnetic Fields to 30 Tesla
… in determining the optoelectronic properties of semiconductors. Magneto-optical spectroscopy provides valuable information on excitons through observation of diamagnetic shifts and Zeeman splittings, but high magnetic fields are required to observe these effects in two-dimensional semiconductors …
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Two-dimensional materials for ubiquitous electronics
… of amorphous silicon and organic semiconductor. Two-dimensional materials are good candidates for ubiquitous electronics because of their excellent properties such as transparency, flexibility, high mobility and low cost. This thesis focused on the development of the first devices and circuits …
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Tunable emission from two-dimensional semiconductor with platelet optical antennas
The remarkable properties of two-dimensional semiconductors allow for abundant research and applications in electronic and optoelectronic area. Monolayer transition metal dichalcogenides (TMDC), such as MoS2 , are direct bandgap semiconductors which hold promises in valley-based optoelectronic …
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Low-dimensional quantum systems
We study low-dimensional quantum systems with analytical and computational methods. Firstly, the one-dimensional extended t-V model of fermions with interactions of finite range is investigated. The model exhibits a phase transition between liquid and insulating regimes. We use various analytical …
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I. Excitonic phase diagram in Si: evidence for two condensed phases ; II. Motion of photoexcited carriers in GaAs/Alx̳Ga1̳-̳x̳As multiple quantum wells : anomalous confinement at high densities
… properties of photoexcited carriers in bulk and two-dimensional semiconductors. Two major topics are addressed: I. Excitonic Phase Diagram in Si: Evidence for Two Condensed Phases At low temperatures and sufficient densities, free excitons in Si and Ge undergo a simultaneous gas-liquid and …
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Carrier momentum relaxation in highly doped polar semiconductors and semiconductor heterostructures
Highly doped polar semiconductors are essential components of today’s semiconductor industry. Most strikingly, transistors in modern electronic devices are polar semiconductor heterostructures. It is important to thoroughly understand carrier transport in such structures. In doped polar …