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Showing 1 to 3 of 3 for “"optische Anregung"”.
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Ultrafast Dynamics in Quasi-One-Dimensional Organic Molecular Crystals
… untersucht. Mit verschiedenen Methoden der optischen Ultrakurzzeit-Spektroskopie werden Prozesse der Exzitonen- und Phononenrelaxation in der Zeit-Domäne untersucht. Die dafür aufgebauten Experimente erreichen eine Zeitauflösung von 20 Femtosekunden. Durch optische Anregung der niedrigsten …
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Ultrafast lattice dynamics in photoexcited nanostructures : femtosecond X-ray diffraction with optimized evaluation schemes
Within the course of this thesis, I have investigated the complex interplay between electron and lattice dynamics in nanostructures of perovskite oxides. Femtosecond hard X-ray pulses were utilized to probe the evolution of atomic rearrangement directly, which is driven by ultrafast optical …
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Structural, electronic and optical properties of cadmium sulfide nanoparticles
In this work, the structural, electronic, and optical properties of CdS nanoparticles with sizes up to 4nm have been calculated using density-functional theory (DFT). Inaccuracies in the description of the unoccupied states of the applied density-functional based tight-binding method (DFTB) are …