Sökning: "Attosecond"

Visar resultat 1 - 5 av 40 avhandlingar innehållade ordet Attosecond.

  1. 1. Attosecond Electron Wave Packet Interferences

    Detta är en avhandling från Division of Atomic Physics, Department of Physics, Faculty of Engineering, LTH, Lund University

    Författare :Thomas Remetter; [2008]
    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

  2. 2. Attosecond Wave Packet Metrology

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Marko Swoboda; [2010]
    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

  3. 3. Sources and Diagnostics for Attosecond Science

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Miguel Miranda; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pulse Compression; High-order Harmonic Generation; Ultrafast; Ultrashort; Attosecond; Femtosecond; Pulse Characterization; Fysicumarkivet A:2012:Miranda;

    Sammanfattning : Ultrafast science refers to physical events that happen on the femtosecond (1 fs=10^-15 s) and attosecond (1 as=10^-18 s) timescales. Generation of attosecond pulses is usually achieved by interacting high-intensity femtosecond pulses with matter (typically gases), in a process called high-order harmonic generation (HHG). LÄS MER

  4. 4. Time-Frequency Analysis in Attosecond Spectroscopy

    Detta är en avhandling från Division of Atomic Physics, Department of Physics, Faculty of Engineering, LTH, Lund University

    Författare :Marcus Isinger; [2018-12]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attosecond; Spectroscopy; Time-Frequency; High-order harmonic generation; Rabitt; Interferometry;

    Sammanfattning : This thesis deals with ultrafast dynamics of electronic processes in rare gas atoms. The processes we explore include photoemission, where we time the emission of electrons moving away from the atomic core following ionization by a photon; and auto-ionization, where the atom spontaneously releases an electron wave-packet following photo-excitation. LÄS MER

  5. 5. Quantum interference effects in attosecond photoionization dynamics

    Detta är en avhandling från Department of Physics, Lund University

    Författare :David Busto; [2020]
    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