Sökning: "electron interference"

Visar resultat 11 - 15 av 87 avhandlingar innehållade orden electron interference.

  1. 11. Quantum interference effects in attosecond photoionization dynamics

    Författare :David Busto; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attosecond; Photoionization; Interferometry;

    Sammanfattning : The interaction of extreme ultraviolet light with matter can lead to the emission of an electron in a process known as photoionization. The electron wavepacket (EWP) created in the continuum propagates on the ionic potential, resulting in a delay compared to an EWP propagating freely. LÄS MER

  3. 12. Control of Coherent Extreme Ultraviolet Light and Light Sources

    Författare :Neven Ibrakovic; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ultrafast lasers; XUV optics; high-order harmonic generation; quantum path interference; opto-optical modulation; free electron lasers; nitrogen lasing; Fysicumarkivet A:2019:Ibrakovic;

    Sammanfattning : Coherent extreme ultraviolet (XUV) light sources are necessary for the investigation of physical processes in the natural length and time scales of atoms. These experiments require a high degree of control of the coherent XUV light. LÄS MER

  4. 13. Ultrafast Photoionization Dynamics Studied with Coincidence Momentum Imaging Spectrometers

    Författare :Yu-Chen Cheng; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photoionization; High-order Harmonic Generation; Extreme Ultraviolet; Free-Electron Laser; Molecular Dissociation; Charge Transfer; Coincidence Measurement; Momentum Imaging; Electron Wave Packet; Fysicumarkivet A:2019:Cheng;

    Sammanfattning : The time scale of the dynamics in atoms and molecules varies from attoseconds (10-18) to picoseconds (10-12) depending on the size of the particles. To study such dynamics, ultrafast light pulses are needed to trigger and capture the reaction. One of the most direct methods consists in ionizing the system and observing the following response. LÄS MER

  5. 14. Electron paramagnetic resonance study of defects in SiC

    Författare :Patrick Carlsson; Nguyen Tien Son; Erik Janzén; Evan R. Glaser; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Silicon carbide (SiC) is a wide bandgap semiconductor (energy gap of 3.26 eV and 3.03 eV for 4Hand 6H-SiC, respectively). With outstanding physical and electronic properties, SiC is a promising material for high-power, high-frequency and high-temperature applications. LÄS MER

  7. 15. Applications of time-dependent configuration-interaction singles for photoelectrons in attosecond and free-electron laser sciences

    Författare :Mattias Bertolino; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; laser-assisted photoionization; photoelectron interferometry; attosecond physics; free-electron laser; second quantization; time-dependent configuration-interaction singles; surface-flux techniques;

    Sammanfattning : This thesis addresses the theoretical treatment of photoelectrons in attosecond and free-electron laser sciences. Wehave implemented methods that extract information on the photoionization process, which we use to investigateinterferometric schemes with particular focus on multiphoton ionization and strong-field effects in attosecondmetrology and coherent control of photoelectrons in free-electron laser science. LÄS MER