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| |  Online-Ressource |
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| Verfasst von: | Sie, Edbert Jarvis  |
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| Titel: | Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides |
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| Verf.angabe: | by Edbert Jarvis Sie |
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| Verlagsort: | Cham |
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| Verlag: | Springer |
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| Jahr: | 2018 |
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| Umfang: | Online-Ressource (XVII, 129 p. 83 illus., 82 illus. in color, online resource) |
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| Gesamttitel/Reihe: | Springer Theses, Recognizing Outstanding Ph.D. Research |
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| | SpringerLink : Bücher |
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| ISBN: | 978-3-319-69554-9 |
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| Abstract: | Chapter1. Introduction -- Chapter2. Time-resolved absorption spectroscopy -- Chapter3. Intervalley biexcitons in monolayer MoS2 -- Chapter4. Valley-selective optical Stark effect in monolayer WS2 -- Chapter5. Intervalley biexcitonic optical Stark effect in monolayer WS2 -- Chapter6. Large, valley-exclusive Bloch--Siegert shift in monolayer WS2 -- Chapter7. Lennard--Jones-like potential of 2D excitons in monolayer WS2 -- Chapter8. WUV based Time-resolved ARPES. |
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| | This thesis presents optical methods to split the energy levels of electronic valleys in transition-metal dichalcogenides (TMDs) by means of coherent light-matter interactions. The electronic valleys present in monolayer TMDs such as MoS2, WS2, and WSe2 are among the many novel properties exhibited by semiconductors thinned down to a few atomic layers, and have have been proposed as a new way to carry information in next generation devices (so-called valleytronics). These valleys are, however, normally locked in the same energy level, which limits their potential use for applications. The author describes experiment performed with a pump-probe technique using a transient absorption spectroscopy on MoS2 and WS2. It is demonstrated that hybridizing the electronic valleys with light allows one to optically tune their energy levels in a controllable valley-selective manner. In particular, by using off-resonance circularly polarized light at small detuning, one can tune the energy level of one valley through the optical Stark effect. Also presented within are observations, at larger detuning, of a separate contribution from the so-called Bloch--Siegert effect, a delicate phenomenon that has eluded direct observation in solids. The two effects obey opposite selection rules, enabling one to separate the two effects at two different valleys. |
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| DOI: | doi:10.1007/978-3-319-69554-9 |
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| URL: | Resolving-System ; Resolving-System: https://doi.org/10.1007/978-3-319-69554-9 |
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| | Volltext: http://dx.doi.org/10.1007/978-3-319-69554-9 |
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| | Cover: https://swbplus.bsz-bw.de/bsz495981362cov.jpg |
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| | DOI: https://doi.org/10.1007/978-3-319-69554-9 |
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| Schlagwörter: | (s)Übergangsmetalldichalkogenide / (s)Wolframsulfide / (s)Molybdändisulfid / (s)Monoschicht / (s)Licht / (s)Materie / (s)Wechselwirkung / (s)Kohärenz / (s)Exziton / (s)ARPES |
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| Datenträger: | Online-Ressource |
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| Dokumenttyp: | Hochschulschrift |
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| Sprache: | eng |
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| Reproduktion: | Druckausg |
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| K10plus-PPN: | 1657191850 |
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| Lokale URL UB: |  Zum Volltext |
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978-3-319-69554-9
Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides / Sie, Edbert Jarvis; 2018 (Online-Ressource)
68214242
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