Modeling strong-field laser-atom interactions with nonlocal potentials

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dc.contributor.advisorAntonsen (Jr.), Thomas Men_US
dc.contributor.authorRensink, Thomas C.en_US
dc.contributor.departmentPhysicsen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2017-06-22T05:49:50Z
dc.date.available2017-06-22T05:49:50Z
dc.date.issued2017en_US
dc.description.abstractAtom-field interactions in the ionization regime give rise to a wide range of physical phenomena, and their study continues to be an active field of research. However, simulation of atom-field dynamics is time-consuming and computationally expensive. In this thesis, a nonlocal model potential is used in place of the Coulomb potential in the time dependent Schrodinger equation, and examined for suitabil- ity of modeling strong field-atom dynamics while offering significant reduction in computation cost. Nonlocal potentials have been used to model many physical systems, from multi-electron molecular configurations to semiconductor theory. Despite their rel- ative success, nonlocal potentials have been largely unexplored for modeling high field laser-gas interactions in the ionizing regime. This work explores the theory and numerical results of a single state gaussian nonlocal model in intense, femtosecond laser pulses, with the main findings: nonlocal potentials are useful for obtaining the photoionization rate in the tunnel and multiphoton regimes, and qualitatively char- acterize the wavefunction dynamics of irradiated atoms. The model is also examined in the context of the two-color technique for producing Terahertz (THz) frequency radiation.en_US
dc.identifierhttps://doi.org/10.13016/M2R56G
dc.identifier.urihttp://hdl.handle.net/1903/19339
dc.language.isoenen_US
dc.subject.pqcontrolledPhysicsen_US
dc.subject.pqcontrolledQuantum physicsen_US
dc.subject.pquncontrolledatomen_US
dc.subject.pquncontrolledionizationen_US
dc.subject.pquncontrolledlaseren_US
dc.subject.pquncontrollednonlocalen_US
dc.subject.pquncontrolledquantumen_US
dc.titleModeling strong-field laser-atom interactions with nonlocal potentialsen_US
dc.typeDissertationen_US

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