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 9 of 9 for “"pump-probe techniques"”.
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Investigation of carrier dynamics in InN, InGaN, and GaAsBi by optical pump-probe techniques /
… transient gratings and differential transmission techniques. The experimental studies in a wide range of excess carrier densities and temperatures revealed that trap-assisted Auger recombination is the dominant recombination mechanism in MBE-grown InN layers at room temperature. Investigation of …
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Ultrafast Dynamics and Nonlinear Interactions in Alkali Atoms and Diatomics
Ultrafast laser pump-probe techniques have been used to study the rovibrational dynamics of the B, C, and D states of the Cesium dimer and to study atomic wavepackets and nonlinear effects in Rubidium and Potassium. Two color, pump-probe techniques have been used to probe the time evolution of …
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Picosecond Time-Resolved Studies of IVR: Theory and Applications of Time-Resolved Fluorescence Depletion
… through the application of picosecond laser pump-probe techniques. A time dependent perturbation theory based description of the interaction of the laser pulses with an ensemble of molecules is presented to show the linear dependence of the signal on the dynamics of the molecular system. Data …
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Optische Kontrolle der Lasertätigkeit im Röntgenbereich
… on the 2p-1s transition in a neon x-ray laser pumped by an x-ray free-electron laser. Theoretical results are presented based on population and photon rate equations. We study the dependance of the x-ray laser's output on the pump pulse's and the optical laser pulse's properties. Small-signal …
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Phonon polariton interaction with patterned materials
… polaritons are studied through both femtosecond pump-probe techniques, and Finite Difference Time Domain (FDTD) simulations in this thesis. The theory surrounding the driving, propagation and detection of these modes is treated in a consistent notational system for both analytical solutions and …
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External Cavity Multiwavelength Semiconductor Mode-locked Laser Gain Dynamics
… a saturable absorber (SA) in the laser cavity. Pump-probe techniques were used to measure the intracavity absorption dynamics of a SA in an external cavity semiconductor mode-locked laser and the gain dynamics of a SOA for the amplification of diverse pulses. The SOA gain dynamics measurements …
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Semiconductor-based all-optical switching for optical time-division multiplexed networks
… is described. The model is validated using novel pump-probe techniques to measure the time-domain response of an SOA subject to various levels of saturation. The model is then used to evaluate the performance of three common SOA-based interferometric all-optical switches. The use of SOAs in …
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Ultrafast spatiotemporal dynamics of photoexcitations in two-dimensional semiconductors
… transition metal dichalcogenides. Using pump-probe spectroscopy, and a range of steady state characterization techniques (ellipsometry, reflectance, photoluminescence), we study the formation and decay of excitons in these materials at low excitation densities. We find that the …
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Magnetic and thermal properties of metallic antiferromagnetic materials
… Kerr effect (MOKE) is often used to probe magnetism of ferromagnetic materials, but MOKE cannot be applied to collinear antiferromagnets due to the cancellation of sublattice magnetization. Magneto-optic constants that are quadratic in magnetization, however, provide an approach for …