Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Anne L'Huillier

Anne l'Huillier

Professor

Anne L'Huillier

Spatial and temporal aspects of intense attosecond pulses for pump-probe experiments

Spatiella och tidsmässiga aspekter av intensiva attosekundpulser för pump-prob-experiment

Author

  • Hampus Wikmark

Summary, in English

Nuclear and electronic dynamics in atoms and molecules are the foundation of many physical processes and chemical reactions. Often, these dynamics take place on timescales so much shorter than those commonly encountered that they are called ultrafast.

In order to study ultrafast phenomena, time-resolved techniques such as pump-probe experiments, involving ultrafast light pulses, are necessary. For these experiments to be successful, the properties of ultrafast light pulses must be carefully controlled and examined in order to discern their influence on the experiment.

This thesis deals with the spatial and temporal properties of XUV light, generated through the process of high-order harmonic generation in gases, using an intense IR laser beam. The influence of the spatial properties of this generating laser on the XUV has been studied, as has the influence of the XUV light's spatial properties on its focusability and peak intensity.

The generated high-order harmonics are also used to study physical phenomena such as multiphoton ionization, something that requires high intensities. An instrument for simultaneous studies of ions and electrons produced by photoionization is also presented.

The efforts towards ultrafast pump-probe experiments include designs for interferometer setups to enable these experiments. Some preliminary results of interferometer testing are also given, including a proof of principle of XUV-IR pump-probe experiments on the Lund Laser Centre intense XUV beamline.

Department/s

  • Atomic Physics

Publishing year

2019-04-23

Language

English

Publication/Series

Lund Reports on Atomic Physics

Issue

556

Document type

Dissertation

Publisher

Department of Physics, Lund University

Topic

  • Atom and Molecular Physics and Optics
  • Other Engineering and Technologies not elsewhere specified

Keywords

  • ultrafast lasers
  • ultrafast optics
  • attosecond pulses
  • pump-probe experiments
  • XUV light
  • XUV focusing
  • wavefront sensing
  • XUV optics
  • X-ray optics
  • Fysicumarkivet A:2019:Wikmark
  • ultrasnabba lasrar
  • attosekundspulser
  • pump-prob-experiment
  • XUV-ljus
  • vågfrontmätningar
  • XUV-optik
  • Röntgen-optik

Status

Published

Supervisor

  • Per Johnsson
  • Anne L'Huillier

ISBN/ISSN/Other

  • ISSN: 0281-2762
  • ISBN: 978-91-7895-042-3
  • ISBN: 978-91-7895-043-0

Defence date

17 May 2019

Defence time

09:15

Defence place

Rydbergsalen, Fysicum, Professorsgatan 1, Lund University, Faculty of Engineering LTH

Opponent

  • Eric Mével (Professor)