@phdthesis{Razinskas2018, author = {Razinskas, Gary}, title = {Functional plasmonic nanocircuitry}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-166917}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2018}, abstract = {In this work, functional plasmonic nanocircuitry is examined as a key of revolutionizing state-of-the-art electronic and photonic circuitry in terms of integration density and transmission bandwidth. In this context, numerical simulations enable the design of dedicated devices, which allow fundamental control of photon flow at the nanometer scale via single or multiple plasmonic eigenmodes. The deterministic synthesis and in situ analysis of these eigenmodes is demonstrated and constitutes an indispensable requirement for the practical use of any device. By exploiting the existence of multiple eigenmodes and coherence - both not accessible in classical electronics - a nanoscale directional coupler for the ultrafast spatial and spatiotemporal coherent control of plasmon propagation is conceived. Future widespread application of plasmonic nanocircuitry in quantum technologies is boosted by the promising demonstrations of spin-optical and quantum plasmonic nanocircuitry.}, subject = {Nanooptik}, language = {en} } @phdthesis{Marquetand2007, author = {Marquetand, Philipp}, title = {Vectorial properties and laser control of molecular dynamics}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-24697}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2007}, abstract = {In this work, the laser control of molecules was investigated theoretically. In doing so, emphasis was layed on entering vectorial properties and in particular the orientation in the laboratory frame. Therefore, the rotational degree of freedom had to be included in the quantum mechanical description. The coupled vibrational and rotational dynamics was examined, which is usually not done in coherent control theory. Local control theory was applied, where the field is determined from the dynamics of a system, which reacts with an instantaneous response to the perturbation and, in turn, determines the field again. Thus, the field is entangled with the quantum mechanical motion and the presented examples document, that this leads to an intuitive interpretation of the fields in terms of the underlying molecular dynamics. The limiting case of a classical treatment was shown to give similar results and hence, eases to understand the complicated structure of the control fields. In a different approach, the phase- and amplitude shaping of laser fields was systematically studied in the context of controlling population transfer in molecules.}, subject = {Laserchemie}, language = {en} }