Avancerad sökning

Visar resultat 6 - 10 av 55 avhandlingar som matchar ovanstående sökkriterier.

  1. 6. 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. 7. Non-linear attosecond physics at 100 eV

    Författare :Alexander Muschet; Laszlo Veisz; Piotr Matyba; Per Eng-Johnsson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; extreme ultraviolet XUV ; non-linear XUV – matter interaction; high-harmonic generation; photoionization; attosecond physics; isolated attosecond pulses; attosecond XUV pump – XUV probe spectroscopy; fysik; Physics;

    Sammanfattning : Non-linear interactions between light and matter have nowadays a broad range of applications. They are used for frequency doubling in simple laser pointers as well as for a variety of purposes in complex laser systems like the one presented in this thesis. LÄS MER

  4. 8. Attosecond information encoded in the photoemission angle

    Författare :Johanna Sörngård; Eva Lindroth; Jan-Petter Hansen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; attosecond; photoemission; delay; circular polarization; angular dependence; asymmetry parameters; attosekund; fotoemission; fördröjning; cirkulärpolarisation; vinkelberoende; asymmetriparametrar; Theoretical Physics; teoretisk fysik;

    Sammanfattning : Electrons that break free during photoionization acquire a phase shift induced by the many-body potential of the parent ion. This phase shift can be interpreted as a delay in the photoionization process. LÄS MER

  5. 9. Spatial and temporal metrology of intense attosecond pulses

    Författare :Helene Coudert-Alteirac; Atomfysik; []
    Nyckelord :Ultrafast optics; High-order harmonic generation; Filamentation; Attosecond; Femtosecond; Extreme ultraviolet; Wavefront measurement; Optical metrology; XUV optics; interferometry; Pump-probe; Fysicumarkivet A:2018:Coudert-Alteirac;

    Sammanfattning : Attosecond pulses are short enough to capture the electronic dynamics in atoms and molecules. The work presented in this thesis deals with the generation and optimization of attosecond extreme-ultraviolet (XUV) pulses. LÄS MER

  7. 10. Scaling and Gating Attosecond Pulse Generation

    Författare :Christoph Heyl; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coherent imaging; Ultrafast electron dynamics; Single attosecond pulses; Attosecond pulse trains; XUV sources; High-order harmonic generation; XUV frequency combs; Fysicumarkivet A:2014:Heyl;

    Sammanfattning : High-order harmonic generation (HHG) provides the basis for attosecond light sources delivering coherent pulses in the extreme ultraviolet spectral region. Such light sources are employed for a variety of applications within imaging, attosecond spectroscopy, and high-precision frequency metrology. LÄS MER