Ultrafast Science and Technologies at ALLS

  • Date: Mar 11, 2020
  • Time: 11:00
  • Speaker: François Légaré
  • INRS-EMT, Montreal
  • Location: Building G
  • Room: Seminar Room 2.06
  • Host: Physical Chemistry
  • Contact: beaulieau@fhi-berlin.mpg.de
Ultrafast Science and Technologies at ALLS
The Advanced Laser Light Source (ALLS) is located at INRS-ÉMT near Montreal. It is the national laser facility of Canada offering access to a variety of laser systems and secondary sources.

We have access to a 750TW Titanium-Sapphire laser system and the facility will be soon upgraded with sub-kW Ytterbium laser systems including a 500W unit operating at 1kHz repetition rate. Over recent years, I have used this facility to develop a set of unique tools to study ultrafast dynamics in molecules and solids. In my talk, I will present pulse compression with the stretched hollow-core fiber approach enabling two-cycle pulses with sub-TW peak power at 1.8 microns. To increase the peak power, I am going to discuss Frequency domain Optical Parametric Amplification and the capability of this approach to generate CEP stable mid-IR laser pulses. Furthermore, in the near future, using the sub-kW Ytterbium laser systems, the performances of these laser sources will be upscaled. In parallel, we capitalize on these developments to push table-top X-ray sources using high harmonic generation, enabling beamlines capable of Resonant X-ray Magnetic Scattering (RXMS) for time-resolved spectroscopy with element specificity. We use them to track ultrafast magnetization dynamics at the M-edge of Cobalt (60 eV) and at the N-edge of Terbium (155 eV).

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