PhD Position in Investigation of the Continuum-Continuum Phase in Photoionization
University of Freiburg

The field of attosecond science at the Albert-Ludwigs-University of Freiburg offers a PhD position: Investigation of the continuum-continuum phase in photoionization
  • Application deadline: 31.01.2022
  • Publication date: 12.12.2021
  • Start-date: 01.02.2022
  • Part-time position (66 %)
  • Id no.: 00001974


In the framework of the DFG project “Investigation of the continuum-continuum phase in attosecond time delays”, a PhD position is available in the field of attosecond science at the Albert-Ludwigs-University of Freiburg in Germany (

The goal of the project is the first measurement of the continuum-continuum phase in photoionization. Towards this goal, the PhD student will develop an optical parametric amplifier (OPA) that will be combined with a train of attosecond pulses generated by an ultrafast laser amplifier (5 mJ at 1 kHz repetition rate). The attosecond pulses and OPA output will be used to photoionise noble gas atoms and the photoelectron spectra will be acquired using a velocity map imaging spectrometer. The analysis of the photoelectron spectra will give access to the continuum-continuum phase. Further information about the scheme to be developed are available in the following references:

P.K. Maroju et al. Nature 578, 386-391 (2020).

P.K. Maroju et al. New J. Phys. 23 043046 (2021).

P.K. Maroju et al. Applied Sciences 11, 9791 (2021).

The project will focus on three aspects:

  • Development of an optical parametric amplifier in the near infrared spectral range.
  • Design and construction of an interferometric setup combining the output of the optical parametric amplifier with an attosecond pulse train.
  • Acquisition and analysis of the photoelectron spectra generated by the attosecond pulses and optical parametric amplified pulses using a velocity map imaging spectrometer.

Relevant Tasks

  • Development of an optical parametric amplifier
  • Data acquisition
  • Data Analysis
  • Construction of spectrometer
  • Programming

What we offer?

  • High impact physics project
  • Access to state-of-the-art attosecond sources
  • Participation to experiments at large scale facilities

Required skills

  • Master in Physics or in Engineering
  • Solid background in atomic, molecular and optical physics.
  • Curiosity and creativity
The position is limited to 4 years. The salary will be determined in accordance with TV-L E13.

We are particularly pleased to receive applications from women for the position advertised here.


Please send your application in English including supporting documents citing the reference number 00001974, by 31.01.2022 at the latest. Please send your application to the following address in written or electronic form:

Physikalisches Institut
Prof. Dr. Giuseppe Sansone
Stefan-Meier-Str. 19
79104 Freiburg

For further information, please contact Prof. Dr. Giuseppe Sansone on the phone number +49 761 203-5738 or E-Mail

Apply now

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