Sökning: "Electron Wave Packet"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden Electron Wave Packet.

1. 1. Attosecond Electron Wave Packet Interferences

   Författare :Thomas Remetter; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attosecond Bound Electron Wave Packet Dynamics; Attosecond Pulse Train; High-Order Harmonics; Electron Wave Packet Interferometry; Attosecond Physics;

   Sammanfattning : Attosecond pulses offer a new route to produce temporally localized electron wave packets (EWPs) that can easily be tailored by altering the properties of the attosecond pulses. In this thesis we will present different experiments, supported by theory, where attosecond EWPs are created in presence of a strong infrared (IR) field. LÄS MER

3. 2. Electron Wave Packet Dynamics on the Attosecond Time Scale

   Författare :Kathrin Klünder; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photoionization; Single attosecond pulses; Attosecond pulse trains; Electron wave packet; Electron dynamics; Interferometry; Photoemission time delay; Fysicumarkivet A:2012:Klünder; Stark spectroscopy;

   Sammanfattning : One objective of attosecond science is to study electron dynamics in atoms and molecular systems on their natural time scale. This can be done using attosecond light pulses. LÄS MER

4. 3. Attosecond Wave Packet Metrology

   Författare :Marko Swoboda; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular dissociation; Electron wave packets; Pulse characterization; Two-color harmonic generation; Attosecond pulse trains; Single attosecond pulses; Resonant two-photon ionization; Fysicumarkivet A:2010:Swoboda;

   Sammanfattning : Attosecond pulses allow the study of electrons on their natural timescale. They are created from the interaction of atoms with ultrashort, intense laser pulses whose electric field approaches the strength of inner-atomic electric fields. This thesis presents experiments around the generation, characterization and application of attosecond pulses. LÄS MER

5. 4. Electron Recombination with Small Molecular Ions

   Författare :Johanna Brinne Roos; Hans Ågren; Åsa Larson; Hans Karlsson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dissociative recombination; ion-pair formation; resonant states; wave packet; molecular dynamics; electron scattering; Theoretical chemistry; Teoretisk kemi;

   Sammanfattning : In this thesis I have theoretically studied electron recombination processes with small molecular ions. In these kind of processes resonant states are involved. To calculate the potential energy for these states as a function of internuclear distance, structure calculations and scattering calculations have to be performed. LÄS MER

7. 5. Attosecond Optical and Electronic Wave Packets

   Författare :Per Johnsson; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optik; acoustics; optics; Electromagnetism; Ionization Dynamics; Electron Wave Packet Interferometry; Electron Wave Packet Control; Pulse Characterization; High-Order Harmonics; Attosecond Pulse Trains; Atom- och molekylärfysik; Atomic and molecular physics; akustik; Elektromagnetism;

   Sammanfattning : When a low-frequency laser pulse is focused to a high intensity in a gas, the electric field of the laser may become comparable to, or even exceed, the electric field between the electrons and the nucleus in the atom. Under such conditions, through a process known as high-order harmonic generation, bursts of extreme ultraviolet radiation may be emitted, with durations in the attosecond domain (1 as = 10^{-18} s), which is the time-scale of electronic processes. LÄS MER