Dresden 2020 – scientific programme

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O: Fachverband Oberflächenphysik

O 44: Ultrafast Electron Dynamics II (joint session O/MA)

O 44.6: Talk

Tuesday, March 17, 2020, 12:00–12:15, WIL B321

VUV user station for femtosecond transmission, reflectivity and ellipsometry experiments — •Shirly Espinoza — ELI Beamlines. Institute of Physics. Czech Academy of Science. Czech Republic

Here, we present a versatile experimental platform, located in ELI Beamlines facility in the Czech Republic, dedicated to ultrafast pump-probe VUV absorption, transmission and ellipsometry with time resolution about 100 fs [1]. The whole system is based on a 30 mJ, 15 fs, 1 kHz in-house-developed laser with central wavelength 830 nm [2]. Its pulses are subsequently transformed into the desired pump and probe beams.

The platform is enclosed in an ultrahigh vacuum chamber equipped with reflective polarizing optics. This setup is equipped with a cryostat for measurements at temperatures from 20 K to 350 K. The upcoming upgrade with switchable Helmholtz coils will enable the experiments in magnetic field up to 1.5 T at 1 kHz. We present the experimental details of this cutting edge platform and discuss the possibilities that external scientists have to carry on their measurements on it.

Supported by the projects Structural dynamics of biomolecular systems (CZ.02.1.01/0.0/0.0/15-003/0000447) and Advanced research using high intensity laser produced photons and particles (CZ.02.1.01/0.0/0.0/16-019/0000789) from the European Regional Development Fund.

[1] S. Espinoza et al., Appl. Surf. Sci. 421, 378-382 (2017)

[2] F. Batysta et al., Opt. Express 24, 17843-17848 (2016)