Attosecond electron dynamics in noble gases and development of a high-repetition-rate OPCPA for coincidence spectroscopy

Medientyp: E-Book

Titel: Attosecond electron dynamics in noble gases and development of a high-repetition-rate OPCPA for coincidence spectroscopy

Beteiligte: Moioli, Matteo [Verfasser]; Sansone, Giuseppe [Akademischer Betreuer]; Sansone, Giuseppe [Sonstige]; Reiter, Günter [Sonstige]

Körperschaft: Albert-Ludwigs-Universität Freiburg, Fakultät für Mathematik und Physik

Erschienen: Freiburg: Universität, 2023

Umfang: Online-Ressource

Sprache: Englisch

DOI: 10.6094/UNIFR/236316

Identifikator:

Schlagwörter: Attosekundenbereich ; Ultrakurzer Lichtimpuls ; Femtosekundenbereich ; Laserimpuls ; Kurzzeitphysik ; Ultraschneller Prozess ; (local)doctoralThesis

Entstehung:

Hochschulschrift: Dissertation, Universität Freiburg, 2023

Anmerkungen:

Beschreibung: Abstract: This thesis aims to investigate photoionization dynamics in small quantum systems on the attosecond time scale. In particular, the first part deals with studying phenomena happening near the ionization threshold using an existing attosecond light source. The second part of the thesis describes the development of a new femtosecond light source based on Optical Parametric Chirp-Pulse Amplification (OPCPA) that can be useful in the generation of attosecond pulses and photoionization experiments. <br>The interaction of attosecond light pulses with matter can lead to the emission of an electron and, thus, to the photoionization of the target. If the photon energy is below the ionization potential but matches the excitation energy needed to populate an excited bound state, then, the emission of the electron happens only after the additional absorption of an Infra-Red (IR) photon. Such resonant photoionization is particularly interesting since the effect of electronic correlations is usually enhanced compared to non-resonant photoionization, providing insights into the electronically excited states of the target. In this work, an in-depth analysis of the resonances in the neon atom that affect the photoelectrons emitted close to the ionization threshold is performed. <br>Another part of this dissertation covers the design and development of a high-repetition- rate OPCPA setup. This system opens the possibility of performing broader types of experiments, for example, the OPCPA allows tuning the wavelength of the output beam, therefore, accessing the prospect of carrying out energy scans of resonances in atoms. Moreover, the design of the setup permits the generation of pulses with a reproducible electric field from one pulse to the other. This property is crucial for the generation of isolated attosecond pulses for future applications

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